Mr. Smarty Pants Knows

Buick vs. Mercedes-Benz, lithium-ion batteries vs. gasoline, and more

Mr. Smarty Pants Knows
The average age of a Buick shopper in 2007 was 55.2 years old, much younger than the average 63.6-year-old Mercedes-Benz shopper.

Today's best lithium-ion batteries can hold about 200 watt-hours per kilogram – a measure of energy density – and they might theoretically be able to store about 400 watt-hours per kilogram. Gasoline has a density equivalent of around 13,000 watt-hours per kilogram.

The average American eats 33 pounds of cheese a year. The average French person eats 53 pounds.

McCoy Tyner, famous for being jazz saxophonist John Coltrane's innovative yet melodic pianist during the 1960s, has a brother named Jarvis who is executive vice chairman of the Communist Party USA.

Each second, the sun converts about 700 million tons of hydrogen into 695 million tons of helium.

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

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