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
Bats sleep 18-20 hours per day.
5
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
A 42-foot sperm whale has about 7 tons of oil in it.
209
The elephant shrew’s closest relative isn’t a shrew — it’s actually an elephant
9