Mouse mummies point to mammalian life in 'Mars-like' Andes

The dry, wind-swept summits of volcanoes in the Puna de Atacama of Chile and Argentina are the closest thing on Earth to the surface of Mars due to their thin atmosphere and freezing temperatures. At their extreme elevations ...

Shark from the Jurassic period was already highly evolved

Cartilaginous fish have changed much more in the course of their evolutionary history than previously believed. Evidence for this thesis has been provided by new fossils of a ray-like shark, Protospinax annectans, which demonstrate ...

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