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In Photos: Mammals Through Time

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Cute Mammal

Credit: Illustration by April Isch, University of Chicago
The 160-million-year-old fossil of an extinct rodentlike creature, now called Rugosodon eurasiaticus, from China is helping to explain how multituberculates…Read More »





— the most evolutionarily successful and long-lived mammalian lineage in the fossil record — achieved their dominance.

Like most early nocturnal mammals, R. eurasiaticus was active at night. This reconstruction shows Rugosodon searching for food among ferns and cycads on the lakeshores in the darkness.    Less «
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Jeanna Bryner, LiveScience Managing Editor

Jeanna Bryner

Before becoming managing editor, Jeanna served as a reporter for LiveScience and SPACE.com for about three years. Previously she was an assistant editor at Scholastic's Science World magazine. Jeanna has an English degree from Salisbury University, a Master's degree in biogeochemistry and environmental sciences from the University of Maryland, and a science journalism degree from New York University. To find out what her latest project is, you can follow Jeanna on .
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