Science Staff

John R. Demboski is senior vice president of science & chief curator at the Denver Museum of Nature & Science. John is an accomplished zoologist and Museum leader who brings more 30 years of museum experience to the position. He is responsible for providing vision and leadership to ensure quality scientific research, appropriate collections stewardship, engaging educational programming and exhibition content, as well as managing a productive team of scientists and collections staff. He will play a critical role in shaping the Museum's strategic vision for science. During his tenure at the Denver Museum of Nature & Science, he has expanded accessibility to collections and increased their overall use. He has served in many different roles that have included multiple initiatives and other large pan-Museum projects related to infrastructure, education, exhibits, and scientific research and collections. In addition, he has served in external leadership roles and on boards in the broader museum collections community.

Educated at Purdue University, his passion for museums was sparked during a volunteer opportunity at the Cincinnati Museum of Natural History, which resulted in a long-term fieldwork experience in the Philippines. This led him to the University of Alaska Fairbanks for his PhD and where he had the opportunity to gain extensive experience in the university’s research collections. After postdoctoral positions at the University of Idaho and Louisiana State University, John joined California State Polytechnic University, Pomona, in 2002, as an assistant professor of biology. In 2006, he landed at the Denver Museum of Nature & Science where he served as curator of mammals and director of zoology & health sciences. 

John’s scientific research has focused on western North American mammals, where he studies the processes that contribute to the diversity of species. His work combines fieldwork and molecular methodology to address fundamental questions about the evolution and distribution of species. He has conducted fieldwork across the western United States, as well as in Canada, Mexico, Mongolia, Paraguay, Philippines, and Russia. 

John has lived all over the United States and is now proud to have established long-term roots in Colorado after calling so many places home. Live music, fly fishing, wildlife, road trips, the mountains, and time with family are his passions.

Google Scholar

ResearchGate

Meghan Truckey is an anthropologist and museum studies professional with a focus in registration, collections management, and zooarchaeology. Meghan grew up in Wisconsin and attended the University of Wisconsin-Madison, where she earned a BS in anthropology and zoology. While working toward her undergraduate degree, she began interning with the campus zoological and anthropological museums. The work she completed at those two museums convinced her to pursue an advanced degree in museum studies. After graduation, she moved to Washington, DC, where she attended The George Washington University and earned an MA in anthropology and museum training. During this time, she also interned at the Smithsonian and the British Museum. Following graduate school, Meghan was a museum technician in the Zoology Department at the Denver Museum of Nature & Science and then senior collections manager and museum registrar at the Maxwell Museum of Anthropology. In 2019, Meghan moved back to Denver and returned to the Museum as registrar.

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Libby Couch joined the Museum in January 2019, after having spent many happy times at the Museum as a guest with her two children. With 15 years of administrative and custom service experience, she supports Anthropology and Earth and Space Sciences by preparing reports, coordinating meetings and logistical planning, and all-around problem solving. What Libby loves most about her job is the contribution she makes to her team, the Museum, and the community. In her free time, Libby enjoys time with her family, gardening, and enjoying all that Colorado has to offer.

Courtney Scheskie was proud to join the Museum in 2015 after a short time as an Education Collections volunteer. She supports the Health Sciences, Zoology, and Integrative Collections team as a spreadsheet master, receipt wrangler, obscure supply finder, logistics guru, and budget magician. In a previous life she received her undergraduate degree in history from Western Washington University and a master’s degree in African studies from the University of Illinois, Urbana-Champaign. Courtney’s favorite place in the world is the Nile shore in Aswan, Egypt, where the Nubian’s river culture reminds her of growing up on the Mississippi in Wisconsin. In her free time she enjoys crafting, reading, and enjoying beautiful Denver, Colorado. 

Melissa Bechhoefer is the director of integrative collections. She is leads a team of 14 professional staff that manage the Museum’s 4.3 million research, education, and archival collections. She is passionate about best-practices in the physical care of collections, and providing researchers, students, source communities, and the public both physical and digital access to collections and their associated data. She is currently focused on completing installation and collections moves to the state-of-the-art Avenir Collections Center, opened in 2014, updating collections policies and procedures, and implementing a collections digitization plan. Melissa has worked in museum collections management and registration for nearly 20 years; she has managed many types of collections throughout her career, including with the National Park Service and the State of Colorado before joining the Museum team in 2012. Melissa is very active in museum professional organizations and was elected to the board of the Association of Registrars and Collections Specialists in 2019.

Rick Wicker gained an interest in photography starting in high school when he worked on the yearbook and newspaper staff as a photographer. Rick started at the Colorado Institute of Art shortly thereafter, and while in school, he began working on projects with the Museum. After 11 years at the Museum, Rick left and worked with renowned Colorado photographer John Fielder, managing his art gallery in Cherry Creek Shopping Center and later in the Santa Fe Arts District. He also spent some time managing Fielder’s publishing house. In 2008 Rick returned to the Museum, continuing his greatest passion for photographing collections material from all of the disciplines. He has also had the opportunity to travel both domestically and internationally for the Museum. Through photography, Rick says he is able to help share the Museum’s story to a vast audience.

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Jeff Stephenson grew up fascinated by natural and cultural history, having been born in Detroit, but also lived in Orlando, Florida, and Farmington Hills, Michigan and Del Mar, California. The natural world was always a few steps out from my family door. He studied archaeology and paleontology but did not pursue a degree, and moved to New York City as an adult to work in the printing industry. But he always wanted to return to the fields of natural science. Thanks to scores of very bright and generous museum curators and researchers, Jeff gained the knowledge and skills that have enabled him to work as a collections manager for over 30 years. 

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More info to come.

Dr. Michele Koons studies ancient complex societies and is especially interested in ancient political dynamics, social networks, and how people of the past interacted with their environment. In her research, Michele uses different geophysical methods and traditional archaeological techniques, such as excavation and pedestrian survey. She also specializes in ceramic analysis and radiocarbon dating. Michele has conducted archaeological research throughout the United States, Peru, Bolivia, Chile, and China. Michele grew up outside of Philadelphia and attended the University of Pittsburgh for her BA. After interning at the Mütter Museum in Philadelphia, she moved to Colorado and worked at the Museo de las Americas in Denver and in cultural resource management in Wyoming. Michele then attended the University of Denver for her MA degree, where she explored the site of Tiwanaku in Bolivia. Michele went on to Harvard University for her PhD and pursued research on the Moche archaeological culture of Peru. While at Harvard, Michele worked at the Peabody Museum and volunteered at the Boston Museum of Science. After defending, she took a postdoctoral position at the Denver Museum of Nature & Science and was hired as curator a year later. Michele currently conducts research in the American Southwest, on Colorado’s Front Range, and in Peru. She curates the Museum’s archaeological collections from Latin American, North America, and Egypt.

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Chris Patrello joined the Museum in 2022.  He is the Curator of Anthropology and is actively involved in ethical repatriation for the Museum's anthropology collections.

Emmy is an environmental archaeologist and is interested in human-environment interactions, plant use, foodways, and colonialism in the US Southwest. She specializes in archaeobotanical methods, especially phytoliths, and studies plant use during the colonial era (17th and 18th centuries) in New Mexico. Emmy has worked on archaeological projects in New Mexico, Colorado, Wyoming, Indiana, Michigan, and Mongolia. Emmy grew up in Denver and is a former teen volunteer at the museum. She attended the University of Chicago for her BA/MA and received her PhD from the University of Texas at Austin. At DMNS, she works on the Textile project.

More coming soon!

Erika is a recent transplant from the Sonoran Desert to the Denver Region.  She has worked in the museum field since 2009, with her first position of 8.5 years working at the Arizona State Museum in the archaeological repository.  She has participated in field work as an archaeologist in Arizona and New Mexico, but was able to dabble and volunteer for the Magic Mountain and Torriette Great Kiva projects DMNS conducted in 2018.  She specializes in a very niche corner of anthropology and studies prehistoric shell trade and manufacture in the southwest.  She is currently exploring ways to incorporate Indigenous perspectives into collections care within the Anthropology department.

Johnny Gordon is originally from the California Mojave Desert and a proud member of the Chemehuevi Band of Southern Paiute (Nuwu/Nuwuvi). He received his Bachelor of Fine Arts in Museum Studies at the Institute of American Indian Arts in Santa Fe in 2022 and was hired on to the Denver Museum of Nature & Science to reorganize and rehouse the Dent and Folsom archeological collections.

His experience in the collections at Lake Havasu Museum of History and the Museum of Indian Arts and Culture has allowed him to refine his expertise in indigenous collections care management. Johnny aspires to foster co-stewardship collaborations through inclusion with tribal nations represented in DMNS’ Anthropology Collections, museum professionals, and the greater public. In particular he strives to evince knowledge pertaining to basketry originating from California, Southwest, and Great Basin tribes.

Casey Mallinckrodt is an objects conservator with experience working on a wide range of materials from contemporary chocolate sculpture to Ancient Egyptian painted coffins. Her greatest interest though, is with collections of material culture and using community collaboration, technical analysis, and cross disciplinary research to deepen the understanding of these objects and to guide thoughtful stewardship.  Casey has been privileged to work on collections of Native American material culture and the arts of Central and West Africa, and South Africa. She is excited to work with DMNS museum colleagues across divisions and with the larger community, and to develop learning opportunities for people entering the discipline.  

Casey received a master’s degree in conservation from the UCLA/Getty Program in the Conservation of Archaeological and Ethnographic Materials, and an MFA is sculpture from the Yale School of Art.  Before joining DMNS Casey was the first objects conservator in the Wadsworth Atheneum Museum of Art’s 180-year history and prior to that was part of a conservation-curatorial team at the Virginia Museum of Fine Arts carrying out the technical analysis, study, and conservation of historic arts of Africa.  

Casey is a trustee of the College of the Atlantic in Bar Harbor, Maine.  

Megan is a member of the Avenir Conservation Center team working on a variety of projects. Megan is the Project Director for an IMLS grant-funded project entitled Northwest Coast Collection: Building Bridges and Detailed Conservation Survey. This project involves collaborating with originating and descendant Pacific Northwest communities to complete a condition survey. Megan also participates in conservation activities required for temporary and permanent exhibitions at the Museum. Some of Megan’s research interests include analytical imaging techniques and implementing feedback from Indigenous communities in conservation practice. 

Originally from Los Angeles, Megan fell in love with cultural heritage conservation during her undergraduate studies at Yale University, where she earned a BA with a double major in History of Art and Egyptology. In 2020, she graduated with her MA from the UCLA/Getty Program in the Conservation of Archaeological and Ethnographic Materials. Megan has conservation experience at fine arts, natural history, and conservation science institutions, as well as with archaeological excavations and in private practice.

Kathleen (Kat) Martin is the Avenir Conservation Center’s Textile Conservator. She has experience working with a variety of Indigenous North American textiles and garments. Her research interests are natural dyes and embellishments of beadwork, quillwork, and ribbonwork. She is focused on collaboration with Indigenous people to further understand and reconnect the personal and social histories inherent in textiles.

Her current endeavors at Denver Museum of Nature and Science are the Textile Research Project and the Southern Plains Beadwork Project, a collaboration with the First Americans Museum and Texas Tech University. In addition, she conserves the textiles in Denver Museum of Nature and Science’s collection and prepares them for outgoing loans to other museums.

Kathleen completed dual Bachelor of Fine Arts degrees in Art History and Painting at University of Illinois at Champaign-Urbana where her work skirted the line between sculpture and clothing. She received a Master’s Degree in Textile Conservation at the University of Glasgow’s Centre for Textile Conservation and Technical Art History in Scotland in 2018 and was an Andrew W. Mellon Fellow in Textile Conservation at the National Museum of the American Indian in Suitland, Maryland. Kathleen has also treated textiles for the National Museum of American History in DC, the National Maritime Museum in London, and the Museum of Childhood in Edinburgh, Scotland. Kathleen spent a decade working in theatrical costuming in New York City before shifting her focus to Conservation in 2012.

Katy Kaspari joined the Denver Museum of Nature & Science in 2023 as a conservator on the IMLS grant funded project, Northwest Coast Collection: Building Bridges and Detailed Conservation Survey. Prior to joining DMNS, Katy worked at the Field Museum, the Natural History Museum in London, the Horniman Museum and Gardens in London, and most recently, in a private practice conservation studio serving Chicago and the greater Midwest. She received her MA and MSc in objects conservation from University College London, undertaking research into decolonization of museums and the use of emerging technologies to digitally restore damaged taxidermy specimens of extinct and endangered species for each of her degrees.

Katy is interested in the conservation of organic materials, and in particular natural history collections. Her primary research interests lie in participatory engagement, collaboration with indigenous people to conserve cultural heritage in culturally appropriate ways, people-centered approaches to conservation, environmental sustainability, and the adoption of emerging technologies in conservation.

Ella joined the Denver Museum of Nature and Science in 2024 as a Conservation Assistant to learn more about the field of Conservation and study under accomplished Conservators before pursuing a graduate degree. She received her BA with a double major of Art History and Chemistry from the University of Virginia. Before coming to the Museum, she worked in Museum collections in a variety of roles, most recently at the University of Virginia’s Special Collections Library as a Collections Assistant for the Fine and Decorative Arts Department.

Ella is interested in using this role to expand her knowledge of conservation while getting valuable experience working in a lab setting and working directly with objects of cultural heritage. She also looks forward to working with many materials and Indigenous cultures to refine her interests in conservation before choosing a specialization during a Conservation graduate program.

Laura Uglean Jackson oversees the Archives Department and serves as records manager for the museum and digital asset manager for the Science Division. She is happiest when developing policies, procedures, and workflows to improve access, storage, and preservation for digital and analog collections. Laura has over 15 years’ experience in Archives and previously worked at the University of Northern Colorado, the University of California Irvine, and the University of Wyoming. She holds an MIS from Simmons University and a BA in Art History from Colorado State University. She is a leading expert in archival reappraisal and deaccessioning and has also published and presented on born-digital processing, backlog management, and collection development.

Lauren Conrad brings a wealth of expertise to the preservation of historical knowledge to her role as Assistant Archivist for the DMNS Archives Department. She holds an MLIS from San Jose State University and a BA in English Literature from the University of Colorado Boulder. Fueled by a passion for bringing history to life, Lauren is especially committed to ensuring widespread access to historical information through diverse and equitable means. She finds the utmost joy in connecting users with information, and aims to bridge the gap between the past and present, fostering a deeper understanding of our collective history.

Allyce Farino joined the Museum in 2023 to support digitization of the Museum's collections into a Digital Asset Management System.

More info to come.

Dr. James Hagadorn is a detective in deep time, seeking to understand how our planet has changed. With a combination of field- and laboratory-based geology, his research informs us about how Earth’s outer membrane has functioned in the past and how it responds to perturbations—today, millions of years ago, and potentially in the future. Many of his publications are available on ResearchGate or Google Scholar.  You can also see his latest videos on YouTube.

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Dr. Tyler Lyson is a vertebrate paleontologist who studies the extinction of the dinosaurs, the rise of placental mammals, and the evolutionary origin of various reptiles, particularly turtles. He combines developmental, genetic, and fossil data with high-resolution chronostratigraphic data to address his research questions. Tyler has conducted fieldwork throughout the American West and has active field sites in North Dakota, Montana, and Colorado. Tyler was born in North Dakota and has been doing paleontology fieldwork since he was in middle school. Tyler received his BA from Swarthmore College and his PhD from Yale University. Tyler joined the Museum in 2014 after a postdoctoral position at the Smithsonian Institution.

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Dr. David Krause is a vertebrate paleontologist who primarily studies early mammals, although he has also published scientific papers on fossil fishes, salamanders, frogs, turtles, lizards, snakes, crocodiles, dinosaurs, and birds. Dave came to the Museum in 2016, after a long career as a professor in the Department of Anatomical Sciences at Stony Brook University, where he primarily taught human anatomy to dental and medical students. Much of his early research work was focused on Paleocene mammals from the Western Interior but that emphasis shifted considerably over 25 years ago to the Late Cretaceous of Madagascar, where he and his teams have made a wealth of exciting discoveries of fossil vertebrates, including complete skeletons. Many of the vertebrates are bizarre, a reflection of the their long history of evolving in isolation. More broadly, Dave’s current research is focused on the evolutionary and biogeographic history of the vertebrate fauna from the southern supercontinent Gondwana. In addition to and complementing his research, Dave founded a not-for-profit organization known as the Madagascar Ankizy Fund (ankizy means “children” in the Malagasy language), whose mission is to provide education and health care to children living in remote areas of the island. For more information, see www.ankizy.org.

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Dr. Gussie Maccracken is the Assistant Curator of Paleobotany, studying fossil plants and their ecological interactions in deep time. She focuses on reconstructing ancient landscapes during the Late Cretaceous (Age of the Dinosaurs), across the Cretaceous–Paleogene mass extinction, and into the first million years of the Paleogene (Age of the Mammals) to understand how ecosystems rebuild after mass extinctions and climate change. Gussie has done fieldwork throughout the Western Interior of North America, including Utah, Colorado, Wyoming, New Mexico, and Coahuila, Mexico. Prior to becoming Assistant Curator of Paleobotany at the Denver Museum of Nature & Science, she was a postdoctoral fellow funded through the National Science Foundation. Gussie received her BA from Colorado College and PhD. from University of Maryland, College Park, where she conducted her research at the Smithsonian Institution National Museum of Natural History.  

Dr. Petermann is a vertebrate paleontologist who joined the Museum as a postdoctoral fellow working on ecosystem recovery after the dinosaur extinction. For his postdoctoral research, Dr. Petermann relies on 3D-reconstruction of fossil vertebrates, the analysis of leaf morphology and plant diversity, plant and vertebrate taphonomy, and the rock record (sedimentology and stratigraphy).

Born and raised in Dresden, Germany, Dr. Petermann received extensive training as a geologist and mineralogist and as an evolutionary and paleo-biologist before moving to the United States to pursue his doctorate degree. He is especially interested in vertebrate life-history reconstructions and organism-environment interactions, which Dr. Petermann uses to better understand vertebrate paleobiology and paleoecology, reconstruct ancient ecosystems, and for the prediction of plausible reactions of tetrapods to past, present, and future environmental and climate change. To accomplish this, Dr. Petermann studies the ontogeny (life history) of extant and extinct vertebrates and how growth rates, maturation time, and longevity are influenced by abiotic and biotic factors in their natural ecosystems, with an emphasis on the Cenozoic (the time after the dinosaurs).

Another set of research questions that Dr. Petermann is very interested in relates to how bone mineral (Hydroxyapatite) varies across vertebrate clades and what this variability reflects. He is particularly fascinated by the mineral’s ability to incorporate different kations (metals such as calcium, magnesium, and strontium) and anion groups (such as carbonate, fluorine, chlorine) depending on element availability and still be able to produce a durable and stable bone scaffold. Among his other interests are early sauropodomorph paleobiology and evolution, body size evolution in tetrapods, and the origins and early evolution of turtles, archosaurs (crocodiles, dinosaurs, and birds) and lepidosaurs (the Tuatara, snakes, and lizards).

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Dr. Annaka M. Clement is a sedimentary geologist and invertebrate paleontologist. Her work usually involves studying ecosystems in deep time, using both the physical environment preserved in the rocks and the organisms preserved as fossils to uncover how ancient communities developed and responded to environmental changes. Annaka has conducted field work in the Western United States and Aotearoa New Zealand, researching environments and seafloor communities in the lead-up to the end-Triassic mass extinction. Following her graduation from North Dakota State University, Annaka came to DMNS in mid-2023 as a postdoctoral scholar. Annaka is involved in a variety of projects at DMNS including paleo-mapping of the Rocky Mountain Region to reconstruct what Colorado looked like in deep time and the integration of fossil data into these maps.

For more information on Annaka’s research, you can visit her website at https://www.annakaclement.rocks/.

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Publication List

Kristen MacKenzie revels in the challenges of managing 1.25+ million specimens for the earth sciences collections at the Museum. Kristen is delighted to support a highly active research group and scientists from around the world. Before arriving at the Museum in 2015, Kristen worked as the assistant collections manager in vertebrate paleontology at the Florida Museum of Natural History. She has also worked as a collections assistant (fossil collections) at Oregon’s Museum of Natural and Cultural History and the John Day Fossil Beds National Monument. Kristen’s MS in geology is from the University of Oregon, where she described the paleontology and geology of an Oligocene-Miocene vertebrate site in southern Oregon that she discovered in 2006. Kristen has become unreasonably fond of early fossil canid, camelid, and rodent alpha-taxonomy and is always enamored with sedimentary basin fill stratigraphy. Working with any Neogene fossil faunas makes her super happy! Dinosaur hunting with the Museum is also viscerally satisfying as is managing deep time collections.

Nicole Neu-Yagle manages the paleobotany, invertebrate paleontology, rock, mineral, and meteorite collections at the Museum. Her MS thesis research focused on Paleocene mammals.

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As a self-described “dinosaur kid”, Sierra has been interested in paleontology from day one. During her time as a geology major at Macalester College in Minnesota, she studied dinosaur coprolites from the Campanian Two Medicine formation of Montana, and assisted in taphonomic studies of microfossil assemblages from the Two Medicine as well. Then, as a graduate student at the University of Georgia, she studied the sequence stratigraphy of the Jurassic Sundance Seaway, and the effects of environmental changes on the fossil communities within it. After her graduate work, she spent a few years working as a geoscientist in the energy industry, but ultimately her love of fossils brought her here to the museum to manage the Madagascar fossil collection.

Eva studied geology in her undergrad at Denison University where she fell in love with earth’s history and the interconnectedness of earth systems though deep time. During her undergraduate studies she also worked at the Denison Museum and discovered a passion for Museum collections. Following her interests in geology, Eva went on to do her Masters in earth sciences at the University of Colorado Boulder. Her research explored microbial involvement in fossilization by examining traces of microbial mineralization in crystal orientation patterns in herbivorous dinosaur coprolites. She then returned to the world of museum collections to help manage the geology collections at the Museum where she continues to learn about earth history through the Museum’s diverse collection of rocks and minerals.

Ana Mendoza Maya is a Collection Assistant in the Earth Sciences division at the Denver Museum of Nature and Science, specializing in paleontology and invertebrate collections. She holds a Bachelor's degree in Biology and a Master's degree in Evolutionary Biology from the Universidad Nacional Autónoma de México (UNAM), where her thesis focused on ammonite taxonomy and biostratigraphy. Ana also earned a Master of Arts in Ecology and Evolutionary Biology from the University of Kansas, where her research on Middle Cambrian trilobites involved advanced geometric morphometrics.

With extensive experience in curatorial work, Ana has contributed to numerous collections management and research projects at institutions such as the Biodiversity Institute at the University of Kansas and the Institute of Geology at UNAM. Her expertise spans taxonomy, fossil preparation, research collection care, fieldwork, and the use of digital tools for specimen cataloging and analysis. Ana has also been actively involved in outreach activities, enjoying opportunities to engage the public in paleontology, particularly young audiences.

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Emory is a collections assistant in the earth sciences collections, specializing in the gems and minerals collection. Growing up in Utah inspired his interest in rocks, minerals, and how they connect to the world around them. Emory gained a bachelor’s degree in Geology from Colorado College to pursue his passion for geology. During Emory’s time at Colorado College, they interned at the Denver Museum of Nature and Science’s fossil preparation lab in the summer of 2021 and the American Museum of Natural History’s invertebrate paleontology collections in the summer of 2023. Their bachelor’s thesis research focused on fault-fluid interactions in tourmaline coated brittle faults in the West Antarctic Rift System of West Antarctica. Emory’s thesis work enabled him to present their research as a poster at the 2022 West Antarctic Ice Sheet Workshop and Geologic Society of America conference. 

ResearchGate

Growing up in Chicagoland, Natalie Toth developed a strong love for natural history museums, which ultimately led to her pursuit of a career in the geosciences. At the Museum, she works alongside a remarkable team of volunteers in the earth sciences labs to collect and prepare fossils from around the world. Natalie has been fortunate to participate in numerous excursions for vertebrate fossils across the Rocky Mountain West and has the opportunity to support the groundbreaking research interests of the Museum’s curatorial staff.

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Salvador Bastien works with the volunteer and intern team in the Earth Science labs to bring new Paleontological specimens in from the field and prepare them for research and exhibition. Growing up in Wisconsin, he developed a passion for the natural world that brought him to Colorado's Front Range for his undergraduate studies. At Colorado College, he gained a deeper understanding of evolution, anatomy, and earth’s history. Interning with DMNS paleontology field teams piqued an interest in the fossil record that expanded to Salvador’s full-time involvement with the Museum since 2018.

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Sadie Sherman works with a team of interns and volunteers to prepare Hell Creek fossils for storage in collections. As a child, she developed a love of dinosaurs and evolutionary biology that became a driving force in her life. This led her to the dinosaur rich fields of Alberta, Canada where she studied biology and paleontology. From there, she would become an intern at DMNS and learn all the preparation steps and techniques necessary to be hired as full-time staff.  

At an early age, Evan knew she wanted to work with dinosaurs and became determined to make that dream a reality as she grew up. This passion led her to study geology and biology at Mercyhurst University, earning her bachelor’s degree in 2021. In the fall of 2021, she became a lab intern at the Museum where she learned to properly prepare and store fossils. Evan now works full-time with an exceptional team of volunteers and interns to prepare Jurassic sauropods from the Morrison Formation in Wyoming. 

Alex grew up in Colorado where she cultivated her passion for the outdoors and natural sciences. She obtained a bachelor’s degree from Colorado State University, where she studied biology and chemistry with a concentration in evolutionary biology, ecology, and conservation genomics. After graduating she interned for the Jurassic Giants and Kaiparowits projects at the Museum, where she fell further in love with paleontology and the Museum's community. Alex now works at the museum as a full-time fossil preparator, where she collaborates with outstanding interns and volunteers to prepare ‘Teen Rex’, share incredible science with museum guests, and contribute to top-notch research.

Dr. Bridget Chalifour is the Genomics Scientist at DMNS. She grew up in Orlando, Florida and developed a passion for ecology by exploring tide pools and salt marshes on the East Coast. She completed her BS in Environmental Science at the University of Florida in 2017 and earned her PhD in Ecology and Evolutionary Biology at the University of Colorado Boulder in 2022. She is a microbial ecologist who studies environmental changes and their effects on microbiomes in both human and animal hosts. Her dissertation research used a combination of preserved museum specimens and wild-caught snails to understand how factors like life stage, time in preservation, human disturbance, and geographic location impact the diversity and composition of the gut microbiomes of Rocky Mountain snails. Her postdoctoral research studied relationships between environmental exposures like air pollution, PFAS levels, changes in weight, and feeding patterns, and 'omics measures, including metagenomic and metabolomic data in human populations. Now, Bridget conducts research leveraging ‘omics technology across human and non-human systems utilizing DMNS’ extensive collection of DNA, frozen tissues, and specimens.

Tiffany Nuessle (pronounced NESS-lee) has had an unconventional career that led to her becoming the research manager of the Genetics Lab. Originally from California, Tiffany attended UC Santa Cruz with hopes of becoming a high school creative writing teacher … then she realized they didn’t offer education as a major, only as a minor. She was lousy at French in high school, but wanted to prove to her teacher that she could do it, so she continued pursuing French in college. She ended up minoring in education and getting degrees in both linguistics and French and Francophone studies. Her senior year of college, a good friend asked her if she had considered becoming a counselor. Tiffany hadn’t. But she did from that point forward, eventually moving to Colorado to attend Denver Seminary and earn her master of arts in counseling. These skills with people led her supervisor to take a chance on her because the Museum wanted someone passionate about communicating science with the public. Tiffany now trains community scientists (volunteers who may or may not have a science background) on how to conduct all aspects of taste research and ensures that the research is done ethically. In this job she has had the joy of using her macrophotography skills (although pictures of tongues were not what she envisioned), her passions for writing, problem solving, and communicating. She is still terrible at French.

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Dr. Ka Chun Yu joined the Museum as part of a team tasked with creating planetarium software to visualize the known universe. He has produced movies and live presentations including Earth systems programs for the digital dome and continued to create new planetarium visualizations and other educational content. He has conducted educational research to study the use of digital planetariums for astronomy education. Ka Chun’s astronomical research is in observational star formation, looking at outflows from protostars and studying the properties of young stellar clusters. He has been involved in observing programs with the Hubble Space Telescope, as well as ground-based optical, infrared, and radio observatories around the world.

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Dr. Garth Spellman is curator of ornithology at the Museum. He grew up in Fargo, North Dakota, and developed a passion for biodiversity science through his first summer job as a lab assistant pinning beetle specimens in a paleontology lab at North Dakota State University. Garth went on to receive a BA in biology from Carleton College, an MSc in zoology from the University of Alaska Fairbanks, and a PhD in biological sciences from the University of Nevada, Las Vegas. He began his professional scientific career at Black Hills State University, initially as a research professor and eventually moving on to become an associate professor. Garth then spent two years serving as a program director in the evolutionary processes cluster of the Division of Environmental Biology at the National Science Foundation. His peer-reviewed manuscripts have been featured in diverse scientific journals, and his work has been featured in several popular press articles and blogs. His research focuses on how recent and ancient environmental changes have affected bird species. Bird species are products of their environment and therefore are constantly evolving in response to environmental change. The response of a species to environmental change leaves lasting footprints in its DNA. Garth uses genetic tools to examine “bird DNA footprints” and determine just how a species or multiple species that make up a modern community have responded to past environmental change.

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Dr. Paula Cushing is senior curator of invertebrate zoology. She began her position in 1998. She received her PhD from the University of Florida in 1995. She is an evolutionary biologist who studies evolutionary patterns and processes in arachnids (spiders and their kin). Her research focuses on the diversity of spiders in the Rocky Mountain/Great Plains ecoregion (the Colorado Spider Survey). She is also involved with projects exploring the taxonomy, systematics, biogeography, and natural history of spiders, scorpions, and solifuges. She has published on myrmecophilic spiders (spiders that live inside ant colonies) and their evolutionary relationship with the ant hosts. She has done research in all the deserts of the western United States, in Florida, Virginia, Tennessee, Kentucky, Mexico, Puerto Rico, Panama, and India. Paula’s current research focus is on arachnids in the order Solifugae, commonly called camel spiders. She and her students are exploring the systematics, taxonomy, morphology, and behavior of camel spiders in the North American family Eremobatidae. She has served as the co-advisor on the graduate committees of master of science and PhD students at various universities. She is also coordinating the collections and research efforts of several Museum volunteers. Paula is very involved with the American Arachnological Society and the International Society of Arachnology.

See her full article list on Research Gate.

Curriculum Vitae

Dr. Frank-T. Krell is the senior curator of entomology at the Museum. His specialty is taxonomy, systematics, ecology, and paleontology of scarab beetles, especially dung beetles. Recording and explaining the high diversity in this insect group, as well as exploring the effects of anthropogenic habitat changes on dung beetle communities, are two main areas of his research. Frank received his diploma in biology (1992) and his doctorate (1996) from the University of Tübingen in Germany. His postdoctoral research took him to the Ivory Coast in West Africa, where he led a project on scarab beetle biodiversity with the University of Würzburg, Germany. After a short period with the Zoological Research Institute and Museum Alexander Koenig in Bonn, Germany, he became a research entomologist with The Natural History Museum, London, UK, in 2000. Before joining the Museum in January 2007, he was the head of the beetle division in London. He has done fieldwork on all continents, except Antarctica, with the main focus on Africa, North America, and Europe. Frank is editor-in-chief of the Denver Museum of Nature & Science Annals and commissioner and councillor of the International Commission on Zoological Nomenclature.

Curriculum Vitae

Publications

Dr. Holly Lutz is associate curator of mammals at the Museum. She is a biologist and genomic researcher specializing in evolutionary biology, microbiology, and disease ecology. Her work primarily focuses on studying the microbiomes, parasites, and pathogens of wild animals, particularly bats and rodents, to better understand their role in ecosystems and their potential impact on human health. By analyzing the genetic material of these organisms, she helps uncover how diseases emerge, evolve, and spread between species. She has conducted extensive fieldwork in Africa, collecting samples from diverse wildlife populations to study their microbiomes and pathogens, as well as the evolution of vertebrate intestinal systems in relationship with symbionts. Her research is crucial for identifying zoonotic diseases—those that can jump from animals to humans—such as viruses and bacteria that could lead to future pandemics. By sequencing the genomes of microbes found in animals, she aims to map out complex host-pathogen relationships and provide insights into biodiversity and disease evolution. Beyond her field research, Lutz collaborates with natural history institutions and academic centers worldwide to integrate genomic data into conservation and public health efforts. Her interdisciplinary approach, combining genetics, ecology, and infectious disease research, contributes to a broader understanding of global health challenges and the intricate connections between wildlife and human well-being.

To learn more visit: Holly Lutz

Google Scholar

Andrew Doll is an animal ecologist interested in the factors influencing population dynamics through spatial distribution patterns and migratory behaviors. His recent research has focused on developing new techniques for using stable isotopes as intrinsic markers of migration patterns and dietary history. Focal species include dunlin, a long-distance migratory shorebird species, and the Steller sea lion, a federally threatened apex predator of the north Pacific. Andrew was born and raised in Wisconsin, where he eventually received a BS in wildlife ecology at the University of Wisconsin Madison. After several years of wildlife fieldwork throughout Colorado and the American West and then a stint in the air quality group at the Rocky Mountain Arsenal, Andrew attended the University of Colorado Denver, receiving an MS in biology. While pursuing his master’s degree, he began working as the ornithology fellow in the Museum’s Zoology Department. This fellowship transitioned into a collections assistant position, then transitioned to the assistant collections manager in 2017 and finally became the collections manager in 2022.  One of Andrew’s primary duties was preparing for and conducting the move of over 1 million zoological specimens into the state-of-the-art Avenir Collections Center.

Curriculum Vitae

Cameron Pittman is a museum professional involved in managing natural history collections, incorporating the tasks of digitization, preparation, and conservation. Cameron was born in Utah and moved across a few states from the West Coast to the East Coast. He received a BS in Wildlife & Fisheries at the University of Georgia, where he was able to intern at the Georgia Museum of Natural History. It was in this museum that Cameron discovered the amazing world of museum collections, learning different methods of specimen preparation and preservation. Afterward, Cameron attended the Museum and Field Studies program at the University of Colorado Boulder, where he worked in the University of Colorado Museum of Natural History’s Vertebrate and Invertebrate Collections and was awarded with a Master’s of Science in 2023. His thesis focused on using CT scanning to gather morphological data on a potentially unique shrew species in Colorado. While pursuing his master’s degree, he took on an internship in the museum’s Digital Research Lab, working on segmenting and studying fossils captured through CT scans. Following graduation, Cameron began working as the Assistant Collections Manager of Vertebrate Zoology, where he helps manage the mammalogy, ornithology, and herpetology collections.

Genevieve Anderegg is a museum professional interested in the management of natural history collections, including specimen preservation, digitization, and preparation. Genevieve was born and raised in Minneapolis and received a BS in evolutionary biology at the University of Wisconsin Madison, where she discovered museum collections and worked at the Wisconsin Insect Research Collection and Wisconsin State Herbarium. Subsequently, Genevieve attended the Museum and Field Studies program at the University of Colorado Boulder, where she worked in the University of Colorado Museum of Natural History’s Vertebrate and Entomology Collections and was awarded her master’s of science in 2022. Her thesis focused on the collections management best practices of fluid preserved insect specimens, an often overlooked and undermanaged portion of entomology collections. Following graduation, Genevieve moved to Denver and began working as the Assistant Collections Manager of Invertebrate Zoology, where she helps manage the marine invertebrate, arachnology, and entomology collections.

Andie Carrillo manages the Zoology Prep Lab, where she prepares skins, skeletons, tissues, parasites, and other vertebrate materials for the zoology collections. Her primary job involves preparing hundreds of specimens a year, ranging in size from hummingbirds to giraffes. She also trains new volunteers on vertebrate prep techniques and engages in public outreach. The prep lab Andie manages is well-stocked and ready for animals of all sizes. It includes a dermestarium in which bones are prepared, two hoods for working with chemicals, and a necropsy table for our extra-large specimens.

Ryan Jones is a research assistant for Dr. Paula Cushing on a large NSF-funded project on North American camel spiders (Solifugae), focusing on a systematic and taxonomic revision of the Eremobatidae family. Camel spiders are a group of arachnids that are distributed in dry habitats throughout the world (excluding the Australopacific), with over 1,100 described species, yet only a handful of biologists worldwide are focused on this group. Ryan’s current thesis work focuses on the Eremobates pallipes and Eremobates scaber species groups, using ultraconserved elements genomic data and morphological characters to revise the taxonomy of these groups and describe new species. His work takes me to wonderful, dry places in the American Southwest and Baja California, Mexico. Ryan is generally knowledgeable about other arachnids, so if you are curious or have questions, feel free to contact him.

When he’s not staring into a microscope, he enjoys hiking, running, and playing rugby. Go Denver Harlequins!

Goran Shikak joined the Museum in 2022.