Bats sleep 18-20 hours per day.
5
Only 3% of bird species have penises.
0
It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Female kangaroos have three vaginas.
2
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
Cats and dogs can hear ultrasound.
350