The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
A domestic cat can sprint at about 31 miles per hour.
274
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Cats and dogs can hear ultrasound.
350