Researchers have unearthed dozens of fossilized teeth in Kuwajima, Japan, which belong to an ancient mammal-like reptile that overlapped with some of the world's earliest mammals for millions of years ...

Researchers have uncovered dozens of fossilized teeth in Kuwajima, Japan, and identified this as a new species of tritylodontid, an animal family that links the evolution of mammals from reptiles. The ...

Before the planet lost T. rex and other carnivorous giants, mammal-like reptiles began to grow whiskers. The findings, published in Scientific Reports last month, suggest that many mammal-defining ...

Ancient reptile had mammal-like tooth enamel Priosphenodon specimens found in Argentina show the Late Cretaceous reptile evolved to have resilient tooth enamel similar to that in mammals Date: May 12, ...

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 ...

A 130-million-year-old skull of a tiny mammal found amid a set of dinosaur bones in Utah more than a decade ago could reshape the way scientists think about the breakup of Earth’s ancient ...

Two weird, mammal-like reptiles that sort of looked like scaly rats, each smaller than a loaf of bread, roamed ancient Brazil about 235 million years ago, likely dining on insects the predators ...

SALT LAKE CITY, Utah (KSL/CNN)-- It may have weighed only 2 1/2 pounds and stood about 6 inches tall, but the discovery of a half mammal, half reptile's skull in eastern Utah has huge implications for ...