Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Cats and dogs can hear ultrasound.
350
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
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
271
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
When cats are happy, they may squeeze their eyes shut.
10