Dinosaurs are the extinct relatives of birds that roamed the lands and seas of ancient Earth. They first appeared around 240 ...

You’re probably familiar with classic sauropod dinosaurs – the four-legged herbivores famous for their long necks and tails.

Within the synapsids, mammals arose from the mammal-like reptiles. The main evolutionary trend during the Mesozoic was the huge radiation of diapsids. The diapsids are a monophyletic group - including ...

Turtles are classified as amniotes, along with other reptiles (including birds) and mammals. Like other amniotes, turtles breathe air and do not lay eggs underwater, although many species live in ...

Nor is Dimetrodon or other reptiles in the same group (previously called 'mammal-like reptiles' and now called synapsids). None of these other extinct groups shared the characteristic upright stance ...

Amniotes split into the sauropsids (leading to birds and reptiles) and synapsids (leading to mammal-like reptiles). These small early mammals developed hair, homeothermy, and lactation (red lines).

The scientists on the team, who are from the Fukui Prefectural Dinosaur Museum in Katsuyama, the Ono City Board of Education and elsewhere, also said a fossil of a mammal-like reptile has been ...

Its thermoregulation properties can tell us about how our ancestors' lifestyles changed as they diverged from reptile-like ...

A replica fossil of the titanosaur _Patagotitan_, one of the largest dinosaurs ever discovered. It would have weighed about 70 tons (63.5 metric tons.) Spencer Platt/Getty Images News via Getty Images ...