Born around 276 B.C. in Cyrene, Libya, Eratosthenes soon became one of the most famous mathematicians of his time. He is best known for making the first recorded measurement of the Earth’s ...

IN Sky and Telescope of September, under the heading “Saluting an Astronomer”, Joseph R. Habes has an article which describes the method adopted by Eratosthenes for measuring the circumference of the ...

Add Yahoo as a preferred source to see more of our stories on Google. Dedicated cyclists set different goals to strive for, from cycling 40 miles in a day to cycling 5,000km or around 3106 miles in a ...

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 ...

A 70-year-old man from Limerick is seeking the Guinness World Record for walking the equivalent of the Earth’s circumference in under 1500 days. Vinod Bajaj, from Castletroy, has walked 40,107km ...