Prefer Newsweek on Google to see more of our trusted coverage when you search. Two brand-new species of early mammals from the Jurassic period have been discovered, revealing the secrets of how we got ...

Scientists have described the earliest known example of dentary bone with two rows of cusps on molars and double-rooted teeth. The new findings offer insight into mammal tooth evolution, particularly ...

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Across the world of mammals, teeth come in all sorts of shapes and sizes. Their particular size and shape are the process of millions of years of evolutionary fine-tuning to produce teeth that can ...

A new fossil described this week captures two intertwined animals caught in a life-or-death struggle right before both were entombed in a volcanic event. Published in Scientific Reports this Tuesday, ...

Earth’s earliest mammals spent their lives at a more leisurely pace than their modern counterparts, but they lived a lot longer, analysis of some 200-million-year-old teeth has shown. Using X-ray ...

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From the formation of inner ear bones to the rise of hair to cover our bodies, these developments made us distinct from other animals Riley Black - Science Correspondent By examining the fossils of ...

A tooth of an extinct mammal, possibly dating back to around 20 million years ago, was discovered on the coast of Oregon. The tooth was spotted on March 25 by Amariah Jacobs, a preschool teacher, who ...

A simple, straightforward developmental rule -- the 'patterning cascade' -- is powerful enough to explain the massive variability in molar crown configuration over the past 15 million years of ape and ...