You might expect a stingray to lay eggs, like many of the world’s fish. However, stingrays give birth to live young, similar ...

A new study finds a link between chemicals and bone loss that could damage males' penises, potentially harming reproduction.

Most species on Earth exist as two biological sexes, and the exchange of genes between males and females is vital for their ...

Deer and elk antlers are encased with a soft, skin-like material that is commonly referred to as velvet that is present from ...