Cows can sleep standing up, but they can only dream lying down.
745
Cat families usually play best in even numbers. Cats and kittens should be acquired in pairs whenever possible!
156
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
In 2005, in Africa, it was reported that three lions rescued a 12-year-old girl from kidnappers and guarded her for half a day until help came.
46
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
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9