The story of the egg spans millions of years, from the first vertebrates that dared to venture onto land to today’s mammals, including the platypus, and of course birds. Like chickens? We’re here to tell you: The egg came first.

The Carboniferous Rainforest Collapse set the stage for a takeover that would be a crucial turning point in the history of terrestrial animal life. If it weren’t for that time when the rainforests collapsed - in an extinction event that...

Snakes have two penises (aka hemipenes) that come in a diverse array of shapes and sizes. And they could owe it all to their lack of legs.

You might not think much of your tongue, but without it, we may have never conquered dry land and the world as we know it.

Because there are so many different types of penises among our evolutionary relatives, we didn’t know until a recent discovery whether they all had the same origin.

We have now completed our study of every single animal phylum but one: Chordata. This is the one that contains humans, as well as the most common animals we interact with every day, like our pets. There are about 81,600 species of...

Florida Cooter tries to get on top of a floating log, the log turns over taking the turtle with it, but he perseveres and manages to climb back on

Close up view of a large, old Green Sea Turtle with a back covered in barnacles as he swims to the surface in turquoise water, takes a breath and dives back down