In 1634, tulip bulbs were a form of currency in Holland.
A male kangaroo is called a boomer.
Penguins have an organ above their eyes that converts sea water to fresh water.
Bamboo makes up 99% of a panda's diet.
The first human-made object to break the sound barrier was a whip.
Beavers were once the size of bears.
The first ballpoint pens were sold in 1945 for $12.00 each.
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