A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Female kangaroos have three vaginas.
2
Cat families usually play best in even numbers. Cats and kittens should be acquired in pairs whenever possible!
156
Domestic pigs average a top speed of about 11 miles per hour.
182
A group of kittens is called a "kindle".
10
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12