In 1924, Andrew "Sandy" Irvine joined George Mallory’s expedition to the world’s highest peak. Now, Irvine’s recently found foot and boot hint at what might have happened on that ill-fated undertaking

In his final letter to his wife, Ruth, before he vanished on Mount Everest a century ago, the 37-year-old Mallory, who once famously said he wanted to conquer Everest "because it's there," tried to ease her worries even as he said his chances of reaching the world's highest peak were "50 to 1 against us."

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

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