Prehistoric times are so interesting to me, and I have such a collection of documentaries on dinosaurs and other animals from before humans existed.
Here's an interesting fact I thought would surprise PC members.
What was the largest terrestrial mammal carnivore that ever existed and what are its closest living relatives?
Bears? Nope.
Wolves? Nope.
Andrewsarchus is the correct answer, and it is most closely related to sheep, pigs, deer, and goats

. It was about 13 feet long, 6 feet tall, and weighed around 2, 400 lbs.
http://prehistoricanimal.blogspot.ca...drosarcus.html
Or how about the largest predatory bird that ever existed? It's Kelenken guillermoi.