A new study posits that same-sex sexual behavior developed to help primates in complex social groups ease tension, reduce ...

A genomic atlas of Nematostella vectensis reveals how primitive animals created multiple cell types millions of years ago, ...

A new study theorizes that evolution ticks at different speeds, especially when a big group of organisms first appears.

Blue blood may look alien, but it’s one of evolution’s most elegant solutions to life in extreme environments. Here’s how ...

Nonhuman primates like bonobos and chimpanzees might engage in same-sex sexual activities to strengthen bonds, particularly ...

For more than a century, biologists assumed that the bony plates embedded in the skin of lizards – like natural chain mail – ...

Homosexual behaviour in primates has a deep evolutionary basis and is more likely to occur in species that live in harsh ...

Once upon a time, there were a bunch of one-celled microbes, swimming, eating, reproducing, doing all the things that a one-cell bit of life can do. Then, some time later, there were their descendants ...

A new study from Bar-Ilan University shows that one of sleep's core functions originated hundreds of millions of years ago in ...

The missing link in the mystery turned out to be an event called the Cambrian explosion. It was only after it that living ...

Earth’s first sponges may have been ghostly, soft-bodied pioneers—ancient animals that evolved long before their skeletons ...

Red blood is the exception, not the rule. Evolution has painted it green, purple and white in animals that push physiology ...