January 21, 2026
The 20th U.S. president, James A. Garfield, published an original proof confirming the Pythagorean theorem (a2 + b2 = c2) while he was a congressman.
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Weird U.S. Presidents Quiz
What animal did Calvin Coolidge grant a presidential pardon to? Whose chair did John Adams and Thomas Jefferson vandalize to get souvenirs? Out of all the facts about presidents of the United States, these are some of the weirdest—how many do you know?
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Jan 20
What did early scientists think dinosaur bones were? -
Jan 19
Which historical leader started college at 15? -
Jan 18
When did the last World War I vet die? (Hint: It was the 21st century.) -
Jan 17
A Las Vegas replica of what monument was accidentally put on a U.S. stamp? -
Jan 16
How long does it take to swim the English Channel? -
Jan 15
What other body part is unique like fingerprints? -
Jan 14
How can video games prepare you for operating an actual nuclear submarine? -
Jan 13
What animal is a living pregnancy test for humans? -
Jan 12
Which U.S. state was once a top exporter of bat guano? -
Jan 11
What common car part contains precious metals?