Science teachers in a summer physics class at Southeast Missouri State University relied on shadows Thursday to calculate the Earth's circumference during the summer solstice, the longest day of the ...

Do you know how to measure the diameter of the earth? No? Then you’re less advanced than they were in 230 BC. You’re basically a Neanderthal with access to a microwave. Find out how to fix that in ...

Introduction If you wanted to measure the circumference of Earth, how long would your tape measure have to be? Would you need to walk the whole way around the world to find the answer? Do you think ...

More than 2,000 years ago, a Greek mathematician proved that the surface of the Earth was curved and not flat. That mathematician was Eratosthenes, who was a geographer, poet, astronomer, and music ...

The U.S. Army has succeeded in shrinking the circumference of the earth by about half a mile. To make the new estimate, according to a paper submitted to the American Geophysical Union by Bernard ...