From spraying mates with urine to changing one's sex, these are the most intriguing courtships in the animal kingdom.

The animal world is full of fascinating (and, let’s face it, bizarre) mating rituals. You will be shocked at the lengths various species will go to procreate. We will explore some seriously odd ...

Scientists have documented same-sex behavior in many animals. Learn what it means, how it varies, and why human labels can mislead.

If you’d like to submit a question to the Outside/In team, you can record it as a voice memo on your smartphone and send it to outsidein@nhpr.org. You can also leave a message on our hotline, 1-844-GO ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Wombats have nearly impermeable rear ends, which serve as ...

Add Yahoo as a preferred source to see more of our stories on Google. While lifelong partnerships may seem rare, many animals form bonds that last for years or even a lifetime. From birds that reunite ...

New York's Museum of Sex expands into the world of animals. June 28, 2008 — -- Did you ever wonder what a bonobo's orgasm sounds like? Or how barnacles reproduce? Did you know that over 300 ...