Green anaconda females are vicious mates, often cannibalizing males after mating. Read here to learn why they do this!

Monk parakeets ease into new friendships, slowly approaching strangers to avoid aggressive encounters. Researchers watched ...

Our ancient primate relatives—including Neanderthals—may have enjoyed a nice peck on the lips. But researchers still don’t ...

The unusual life cycle of ants reflects their social behavior, with some individuals foregoing reproduction to tend to the ...

In the animal kingdom, penises can be spiked, split, corkscrewed – even detachable. They’re one of the most diverse ...

Parakeets don’t rush friendship. New research shows they test early interactions to minimize risk and build safe, lasting ...

Kissing could be 21 million years old. NPR's Ayesha Rascoe speaks to Matilda Brindle an evolutionary biologist from Oxford University about the origins of smooching.