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
Dolphins have names for one another.
18
In Australia, there are spiders big enough to eat snakes.
20
Penguins have a gland above their eye that turns saltwater into freshwater.
12
Dogs sometimes fake being sick to get attention.
26
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5