Cows can sleep standing up, but they can only dream lying down.
745
Lobsters have blue blood.
476
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
One in three dog owners say they have talked to their pets on the phone.
427
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
A domestic cat can sprint at about 31 miles per hour.
274