The elephant brain weighs about 6,000g.
274
Parrot parents "name" their children with a signature call.
112
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
10
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
When cats are happy, they may squeeze their eyes shut.
10
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2