Humans don’t have a defined mating season like deer or wolves. Here’s how evolution blended biology, culture and social life into year-round intimacy.

Older male whales are more successful at mating than their younger rivals because they are better singers, suggests new ...

New research reveals that ancient interbreeding between humans and Neanderthals shaped our modern human DNA - especially on the X chromosome.

Recovering humpback whale populations are revealing a hidden shift: older males are increasingly outcompeting younger rivals to father calves.

Scientists say DNA evidence indicates male Neanderthals and human females interbred more often than opposite ...

Much of the eastern United States is currently undergoing a massive polar vortex, with another one expected to follow.