Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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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.
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The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
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Cats sleep for 70% of their lives.
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In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
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