Eons

What did life look like when the Amazon watershed flowed backwards? How did its direction shape the evolution of life around it? And what force could have possibly been strong enough to up-end one of the world’s mightiest rivers between then and now?

While the evolution of the butthole was a major breakthrough in animal development, its story might actually end with redefining what it means to have a butthole at all.

In 2003, a fossil belonging to a mammaliaform was discovered in an ancient lakebed in what's now China. It was an almost complete skeleton the size of a platypus, a find that complicated the history of mammaliaforms. It painted a picture of their explosive diversification, their mysterious disappearance, and how our own ancestors might have survived thanks to a leg up from some leafy allies…

Where are all the east coast dinosaurs? Why don’t we find famous species like Triceratops in Central Park? Turns out, evolution and geology came together to make the east coast into an ancient lost world of weird dinosaurs.

We may have the Himalayas to thank for everything from the rise of giant flightless birds in Madagascar; to the disappearance of plants from Antarctica; to the expansion of the great grasslands of North America, and more.

Where did our unique moon come from? It turns out that lunar rocks brought back by Apollo astronauts are a clue, pointing to the origin of our closest cosmic companion, an origin even stranger than you might imagine…

What suddenly made long jaws such a liability? Well it looks like we can thank a changing climate for the evolution of the elephant’s trunk.

When exactly did we start drinking other things, and why? To find out, we have to look at the world’s oldest beverages – which might not be what you expect.

How did the "false horse," Thoatherium, and its relatives survive when their hoofed legs seemed to be adapted for an ecosystem that wouldn't exist for another 12 million years?

We need to talk about the biggest break-up of all-time: the break-up of the supercontinent Pangea, and how, ultimately, when India smashed back into Asia, it traded one form of evolutionary isolation for another.