Earth’s ancient history is full of giant versions of modern animals. Evolutionary forces, like competition for resources, or changes in climate, pushed these species to become incredibly large. And we’re not just talking about giant dinosaurs – there were huge mammals and marsupials too.

A lot of these giants lived in the Pleistocene, an epoch stretching from around 2.5 million to 11,000 years ago. Mysteriously (or not), the extinction of many of these animals coincides with humanity’s arrival as a dominant predator.

Illustrations by Mary McLain

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