SCIENCE
12/24/2014 08:25 am ET Updated Dec 24, 2014

5 Prehistoric Mammals That Were Way More Monstrous Than You Probably Thought (VIDEO)

There's no doubt bunnies, piglets, and even squirrels are cute and cuddly -- but it turns out that some of their prehistoric ancestors and relatives were quite the opposite.

In fact, some ancient mammals were extreme in terms of size, ferocity, and even their locomotion. You would not want to run into them...

Don’t just take my word for it. Check out the video above and/or read the transcript below to travel to a time when pig-like creatures were "terminators" and squirrels had fangs. Keep in mind, this is just a small sampling of the now-extinct mammals that once roamed the Earth. Did we miss out on your favorite prehistoric beast? Let me know in the comments. Talk nerdy to me!

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