The elephant brain weighs about 6,000g.
274
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Denmark has twice as many pigs as there are people.
66
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
Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
47
The world’s largest frog, the Goliath frog, can grow over 13 inches in length and can jump up to 10 feet in a single bound.
8
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9