A lion in the wild usually makes no more than twenty kills a year.
186
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Cats and dogs can hear ultrasound.
350
A cow produces around 200,000 glasses of milk in her lifetime.
373
In 1955, the citizens of São Paulo were so upset with their government that they elected a rhinoceros named Cacareco (meaning rubbish) to the city council in protest, with over 100,000 votes.
18