Bats sleep 18-20 hours per day.
5
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328
Parrot parents "name" their children with a signature call.
112
Squirrels forget where they hide about half of their nuts.
698
Unsinkable Sam (nickname of a German ship's cat) who served on 3 warships, one German, two British, all sank in action. The cat survived each sinking, floating away on wooden planks to rescue.
19
Cats recognise the voice of their owner, but never evolved to care.
22