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 ...

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 ...

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 ...

A San Luis Obispo resident rode the equivalent of the circumference of the Earth on his bike. Tony Murphy took 11 years to ride 24,901 miles on his bike, which is the same as one time around the Earth ...

Some days the world feels really big and some days it feels quite small, but as you might suspect, it doesn't actually change size. Here in the 21st century, we know the circumference, density, and ...

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 ...