Results for "History"
Found 5 results
Measuring the Earth with a Stick and Sand
How Eratosthenes measured Earth's circumference in 240 BC using shadows, geometry, and a stick in t…
Thales Measured the Heavens with a Stick
Thales of Miletus used a wooden staff and shadow geometry to measure the heavens around 600 BC, tur…
How an 8-Foot Pole Built a Capital
Discover how the Duke of Zhou used an 8-foot bamboo pole and sunlight to align the Western Zhou cap…
When the King Yelled at the Sun
When the sun vanished at noon, King Tai Wu yelled at the sky. Wu Xian used oracle bones and math to…
How One Rope Tamed Gravity in 2600 BC
Imhotep used a knotted rope and the Seked ratio to build the Step Pyramid. See how math beat gravit…