Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
A rodent's teeth never stop growing.
16
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
Some species of fish have voices!
81
When you shave a guinea pig it looks like a little hippo.
19
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
Cuban rescue workers use sniffer rabbits to find people in collapsed buildings.
10
World's heaviest primates: morbidly obese humans. After that: gorillas at 485 lbs.
106