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A saga from the 1200s says a king found the hidden sun by looking through a clear rock, and scientists have been testing it ever since.

In the year 859, a young woman named Fatima spent her inheritance to build a school in Fez, Morocco—and more than 1,100 years later, it’s still open.

In 1962, John Glenn told NASA he wasn't climbing into his rocket until Katherine Johnson re-did the computer's numbers with a pencil.

Roman sea walls poured around 2,000 years ago are stronger today than they were on the day they hardened.

1,100 times the pressure at sea level can crush a car's frame, but something else entirely kept a 2,400-year-old shipwreck looking almost brand new.