Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
One in three dog owners say they have talked to their pets on the phone.
427
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