Movement defines life across the animal kingdom. From a fish cutting through water to a bird taking flight, muscles power every action. For decades, scientists believed the machinery behind those ...

Animals from completely different branches of the tree of life, such as insects, worms and vertebrates, independently evolved similar genetic solutions to survive on land, according to a new study ...

A study has found that the reason why the evolution of the first animals to appear on Earth was delayed for over 10 million years was due to their reproductive methods. Early animals reproduced by ...

When people build cities and introduce invasive creatures, resident critter populations sometimes adapt Brian Handwerk | Science Correspondent Several species have evolved in response to human ...

As all children learn, everyone poos. But when did this begin? And what evolutionary and environmental changes accompanied ...