History feed
43.3 m
Yes. The Pantheon's dome, finished under the emperor Hadrian around AD 125, spans about 43.3 meters and remains the largest dome of unreinforced concrete anywhere.
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.