Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
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Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
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
Whales and dolphins can't taste anything other than salt.
11
A group of pugs is called a grumble.
10