Denmark has twice as many pigs as there are people.
66
Sharks have been on the planet longer than trees.
14
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
The largest earthworm on record was found in South Africa and measured 22 feet.
151
A 42-foot sperm whale has about 7 tons of oil in it.
209