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
Cows can sleep standing up, but they can only dream lying down.
745
Domestic pigs average a top speed of about 11 miles per hour.
182
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
A lion in the wild usually makes no more than twenty kills a year.
186
When cats are happy, they may squeeze their eyes shut.
10