In today’s fast-changing world, where species are constantly evolving and many are disappearing, it’s fascinating to learn ...

A new study suggests the platypus and echidna — the only egg-laying mammals — had a water-dwelling ancestor. The finding ...

Found on two landmasses off the coast of the Yucatan, these surprise species could unfortunately already be in danger.

What are the 10 most colorful animals? We've done the research! Jump in to read about which are the ultimate colorful animals ...

Analysis of the fossil suggests that the only two egg-laying mammals, platypuses and land-based echidnas, both descended from ...

Agriculture Secretary Brooke Rollins issued a scathing letter to her Mexican counterpart Saturday threatening to block the ...

“There is no way to predict the biology of this last common ancestor without animals like monotremes.” Amanda Schupak is a science and health journalist in New York City.