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Illustration of a warm-blooded ancestor of mammals

Ear anatomy shows warm-blooded animals evolved 233 million years ago

20 July 2022

Analysis of inner ear canals from hundreds of modern and fossil animals shows that warm-bloodedness appeared abruptly in the late Triassic
Illustration of Qikiqtania wakei in the water

A fish that evolved to stand up on land went back to living in water

20 July 2022

A fossil from 385 million years ago named Qikiqtania wakei shows that a descendant of early land animals lost its adaptations for land and became a more efficient swimmer

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