The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
When cats are happy, they may squeeze their eyes shut.
10
Cats and dogs can hear ultrasound.
350
Alligators can live up to 100 years.
337
By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
9
The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
492
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8