George Mallory (18 June 1886 – 8 or 9 June 1924). During the 1924 British Mount Everest Expedition, Mallory and Andrew "Sandy" Irvine (on the left) disappeared somewhere high on Everest's North-East ridge. The pair's last known sighting was only about 800 vertical feet from the summit. Mallory's fate was unknown for 75 years, until his body was discovered on 1 May 1999. Whether Mallory and Irvine reached the summit before they died remains a subject of speculation and continuing research.

George Mallory (18 June 1886 – 8 or 9 June 1924). During the 1924 British Mount Everest Expedition, Mallory and Andrew "Sandy" Irvine (on the left) disappeared somewhere high on Everest's North-East ridge. The pair's last known sighting was only about 800 vertical feet from the summit. Mallory's fate was unknown for 75 years, until his body was discovered on 1 May 1999. Whether Mallory and Irvine reached the summit before they died remains a subject of speculation and continuing research.