British surveyor Michael Spender created the first detailed photogrammetric map of Mount Everest’s North Face in 1935 using 1,200 aerial photos and ground measurements. His map guided major British ...

A river "capture" event in the Himalayas 89,000 years ago caused so much erosion it may have pushed the peak of Everest up by 164 feet. When you purchase through links on our site, we may earn an ...