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 ...

Mount Everest is about 15 to 50 meters taller than it would otherwise be because of uplift caused by a nearby eroding river gorge, and continues to grow because of it. Mount Everest is about 15 to 50 ...