A study in Nature reveals how gut cells sense microbial flagellin and signal the brain to stop eating—introducing a sixth ...

Two exceptionally well preserved reptile skeletons dating back to the Triassic period have totally rewritten our understanding of the evolution of skin appendages such as feathers and hair. Known as ...

Mirasaura grauvogeli had a featherlike crest and a tail like a monkey. “It's been a long time since I've been so blown away by a new fossil discovery.” ...

Preserved in tan stone, the fossil of Mirasaura included much of the ancient reptile’s skeleton and a feather-like fan that ...

From a predator’s perspective, these features create an illusion of a second head at the rear of the butterfly. If the attack ...