Denmark has twice as many pigs as there are people.
66
The cat brain weighs about 30g.
167
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
271
The seahorse is the only fish to have a neck.
12
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Camels and llamas can cross breed. The offspring is called a ‘Cama’.
10