Cows can sleep standing up, but they can only dream lying down.
745
Sheep, goats, octopuses, and toads have rectangular pupils.
7
The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
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