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
Mahatma Gandhi used to travel with his goat so that he could have fresh milk.
11
Condoms were originally made of animal intestines or linen.
347
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
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492