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Sudoku puzzles

Will We Ever Run Out of Sudoku Puzzles?

Advertising poster for the opening in Paris of "Montagnes Russes" (Russian Mountains), c. 1882-1888, by an anonymous artist; in the collection of the Musee Carnavalet, Paris, France. (graphic arts, posters, roller coasters)

Where Was the First Roller Coaster Invented?

Discover

Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

illustration of the walking titanosaurus, Patagotitan mayorum

Titanosaurs: 8 of the World's Biggest Dinosaurs

Two chicks near an egg with a white background (poultry, chick, chickens, birds).

What Do Eggs Have to Do with Easter?

Lusitania sinking, illustration from The War of the Nations (New York), December 31, 1919. World War I, WWI. This image is one of three on the page. (See source file for the other two.)

7 of the World’s Deadliest Shipwrecks

Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,

Which Religion Is the Oldest?

Statue of Nostradamus

Nostradamus and His Prophecies

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

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sudoku smudged faces problem brakeman-fireman-engineer puzzle unexpected hanging paradox puzzle number game crossword puzzle Tower of Hanoi magic square Soma Cube