Uploaded June 2024 | Updated September 2026, 2 weeks ago

---

Did you know? Mosasaurs’ closest living relatives are today’s lizards and snakes! Meet Amelia Zietlow, a comparative biology student in the Museum’s Richard Gilder Graduate School. She studies the evolution, ontogeny, morphology, and intraspecific variation of lizards and snakes, particularly mosasaurs. Many thanks to the North Dakota Geological Survey for the Jormungandr walhallaensis footage! #fossils #womeninstem