Imagine if the pesky little rat that your cat chased out of your house was the size of a cow!
This prehistoric marvel is closely related to rodents except they are big and scary looking. Luckily, they went extinct around 2 million years ago.
Josephoartigasia were rodent species weighing 1 ton that frolicked around in modern-day Uruguay.
They could have been herbivorous, but nobody wants to encounter or provoke a rodent that big for fun!