Glyptodonts could grow to around the size of a car, reaching as much as 10 feet long.
Imagine a 10-foot-long armadillo. It's a damn shame they no longer exist, because they sound absolutely badass.
Fear not, though. The creatures were gentle giants, and were completely herbivorous.
Unfortunately, it is thought that they bit the dust at the start of the last ice age.
Their shells were made of bone and could weigh as much as 1,100lbs (500kg), which is about 20 percent of their overall body weight.