The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
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Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
There's a phone app called RoboRoach that allows you to remotely control a cockroach through a chip that you to manually implant into the unwitting critter.
10
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
Early American humans hunted car-size armadillos and used their shells for houses.
12