Add Yahoo as a preferred source to see more of our stories on Google. Ancient fossil evidence reshapes the story of the evolution of echidnas and platypuses, revealing a surprising aquatic ancestry.

Egg-laying echidnas and platypuses are among the world's most bizarre mammals. With a spotty fossil record, it's difficult to tell how these monotremes evolved. But evidence is mounting that the ...

The platypus is one of the most unusual mammals known to science, combining traits typically associated with birds, reptiles and aquatic animals. Among its distinctive features is a venom system found ...

If you’ve always thought echidnas and platypuses were distant cousins who went their separate ways on land and water, think again. A single fossilized arm bone, found in a remote corner of ...