History feed
20 yrs
The Eiffel Tower was built for the 1889 Paris World's Fair under an arrangement initially lasting twenty years. Its usefulness for scientific work and especially radio helped preserve a structure that might otherwise have been dismantled.
2,500
Cleopatra lived closer to the 1969 Moon landing than to the construction of the Great Pyramid. The pyramid was already about 2,500 years old when she was born.
4,000
A surviving population of woolly mammoths lived on Wrangel Island while Egyptians were building the Great Pyramid. These Arctic animals persisted until about 4,000 years ago, long after most mainland populations disappeared.