When cats are happy, they may squeeze their eyes shut.
10
In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
22
In Australia, there are spiders big enough to eat snakes.
20
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14