The investigators at Debunked challenge the common perception of how massive prehistoric giants truly were. Senate Approves ...

Sloths weren't always slow-moving, furry tree-dwellers. Their prehistoric ancestors were huge — up to 4 tons (3.6 metric tons) — and when startled, they brandished immense claws.

But beyond the Smilodon, there are other incredible wild cats such as the Megantereon and the giant Dirk-toothed cat, both of which were far superior in size compared to modern-day cats. These ...