Evolution

Hallucination may have more to do with our shared brain chemistry with snails, insects, and sea urchins

Contrary to popular belief, it had little to do with the dinosaur-killing asteroid

Mutualistic partnerships between species abound across nature—but it’s a tricky dance to make sure both parties keep pulling their weight

Cephalopods are loners, but they’re also intelligent

It’s become uniquely suited to handle below-freezing temperatures and a diet of poisonous plants

A maternally inherited bacteria that turns males into females is foiled by a brief warm spell