Eratosthenes became the first person to calculate the Earth’s circumference with remarkable accuracy, a feat that stands as a testament to the ingenuity of ancient science. Using the differences in ...

Day by day and step by step, he’s aiming to log 24,901 miles, which is equal to Earth’s circumference at the equator. It’s a target he set 14 years ago when his doctor told him it was time ...

His daughter, Mercedes Kilmer, confirmed to the New York Times that the cause of death was pneumonia. Kilmer had battled throat cancer since 2014 and underwent two tracheostomies, before ...