When a National Geographic documentary team discovered a boot and sock sticking out of a melting glacier on Mount Everest in September, they almost immediately recognized its significance as a clue to solve a century-old mystery.

Remains found on Mount Everest may have belonged to the British climber Andrew Comyn “Sandy” Irvine, who disappeared along with George Mallory in 1924.

In 1924, British explorer Andrew Comyn Irvine—nicknamed Sandy—and his partner George Mallory aimed to become the first to reach the summit of Mount Everest. But the two climbers disappeared on the expedition,

One of the greatest mysteries in mountaineering history has taken a step closer to resolution. Grayson Schaffer’s recent article in National Geographic revealed