Men have nipples, mammary glands and the hormones required, but the ability for male lactation rarely turns on. Here’s why ...

King penguins are adapting to climate change in a way that seems to help them breed successfully, which is unusual.

The platypus is one of nature’s strangest mammals. This egg-laying animal sweats milk, hunts by sensing electrical signals, carries venomous spurs, and even glows under ultraviolet light. Discover the ...

Inside the growing scientific quest to understand what creatures with the extraordinary ability to defy the ravages of time can teach us about making human aging better.