Animals have been reproducing sexually for hundreds of millions of years, but not always like we do it. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

Are you familiar with asexual animals? Asexual animals reproduce without involving sex or traditional fertilization. While this might sound strange, it’s actually quite natural—and even helps many ...

Animals that can change their sex naturally might sound surprising at first, but in nature, it is simply another survival ...

Most animals on Earth have two sexes, male and female, that combine and mix their genes when they reproduce. We are so accustomed to this state of affairs that the existence of all-female species that ...

No males needed — animals that reproduce through the mind-blowing process of parthenogenesis. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Our planet is filled with a dazzling variety of creatures that bump uglies to reproduce. Cats do it. Dogs do it. The birds and the bees definitely do it. But what were the first animals to have sex?

Ary Hoffmann receives funding from the Australian Research Council. Michael Kearney does not work for, consult, own shares in or receive funding from any company or organization that would benefit ...