The elephant brain weighs about 6,000g.
274
Male monkeys lose the hair on their heads in the same way men do.
41
Sheep outnumber humans in New Zealand 15 to 1.
33
A full-grown bear can run as fast as a horse.
35
Parrot parents "name" their children with a signature call.
112
The octopus does not have a blind spot.
273
Elephants are among the most emotional creatures in the world - they have even been known to rescue other animals, such as trapped dogs.
25
In the last 4,000 years, no new animals have been domesticated.
25