Mr. Smarty Pants Knows

Plywood, water, the human heart, the kilogram, and Clint Eastwood

Mr. Smarty Pants Knows
Plywood was first made 5,500 years ago in ancient Egypt.

Only 1% of the world's water is in a form that is usable to humans. The rest is salt water or in solid form as ice caps and glaciers.

The human heart, full of blood, weighs three-quarters of a pound.

The standard for the kilogram – a chunk of metal, under triple lock and key since 1889 at the International Bureau of Weights and Measures in Sèvres, near Paris – is actually 50 micrograms lighter.

Clint Eastwood used to be a hay baler.

The above is information that Mr. Smarty Pants read in a book, magazine, or newspaper; heard on the radio; saw on television; or overheard at a party. Got facts? Write to Mr. Smarty Pants. Why not visit mrsmartypants.com?

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