To find out if a watermelon is ripe, knock it, and if it sounds hollow then it is ripe.
84
A cat's jaws cannot move sideways.
194
Elephants, lions, and camels roamed Alaska 12,000 years ago.
32
A zoo in China gave a gay penguin couple the opportunity to raise a chick.
11
Rats multiply so quickly that in 18 months, two rats could have over a million descendants.
33
A queen bee uses her stinger only to sting another queen bee.
39
There wasn't a single pony in the Pony Express, just horses!
57