A dragonfly has a lifespan of 24 hours.
24
A duck's quack doesn't echo, and no one knows why.
173
Ants don't sleep
15
A blue whale's aorta (the main blood vessel) is large enough for a human to crawl through.
52
Most domestic turkeys are so heavy they are unable to fly.
114
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20