• Base camp of the National Geographic crew, illuminated below Everest. Renan Ozturk/National Geographic
  • Jim Hurst, Thom Pollard, and Mark Synnott sit in Jilong shortly after crossing the border from Nepal. Renan Ozturk/National Geographic
  • Thom Pollard in Tingri, catching a first glimpse of Mt. Everest at sunset. Renan Ozturk/National Geographic
  • Mark Synnott, Jamie McGuinness, and Thom Pollard map out a plan to climb the north side of Mt. Everest in search of Irvine's remains. Renan Ozturk/National Geographic
  • Thom Pollard. Renan Ozturk/National Geographic
  • Mark Synnott and Jamie McGuinness. Renan Ozturk/National Geographic
  • Mark Synnott during the expedition. Renan Ozturk/National Geographic
  • Mapping out a plan to climb the north side of Mt. Everest. Renan Ozturk/National Geographic
  • Mark Synnott and Renan Ozturk look at a GPS path for the drone during the expedition. Matt Irving/National Geographic
  • Members of the expedition with gear and supplies. Renan Ozturk/National Geeographic
  • Team members pose for a group photo with Sherpa team. Renan Ozturk/National Geographic
  • Sunlight touches the top of Mt. Everest. Renan Ozturk/National Geographic
  • Mark Synnott at "interim camp," halfway between Base Camp and Advanced Basecamp. Renan Ozturk/National Geographic

Edmund Hillary and Sherpa mountaineer Tenzing Norgay made climbing history when they became the first men to successfully summit Mount Everest on May 29, 1953. But there's a chance that someone may have beaten them to the summit back in 1924: a British mountaineer named George Leigh Mallory and a young engineering student named Andrew "Sandy" Irvine. The two men set off for the summit in June of that year and disappeared—two more casualties of a peak that has claimed over 300 lives to date.

Lost on Everest is a new documentary from National Geographic that seeks to put to rest the question of who was first to the summit once and for all. The gripping account follows an expedition's attempt to locate Irvine's body (lost for over 95 years) and hopefully retrieve the man's camera—and photographic proof that the two men reached the summit.

NatGeo is also premiering a second companion documentary, Expedition Everest, narrated by actor Tate Donovan (MacGyver, Man in the High Castle), following an international team that included multiple scientists as they trek up the mountain. Along the way, team geologists collected sediment samples from the bottom of a Himalayan lake; biologists surveyed the biodiversity at various elevations to track how plants, animals, and insects are adapting to a warming climate; and climate scientists collected ice cores from the highest elevation to date to better understand glacier evolution. Finally, the team installed the world's highest weather station in Everest's infamous "death zone," above 26,000 feet, to gather real-time data on weather conditions at that altitude.

Mallory is the man credited with uttering the famous line "because it's there" in response to a question about why he would risk his life repeatedly to summit Everest. An avid mountaineer, Mallory had already been to the mountain twice before the 1924 expedition: once in 1921 as part of a reconnaissance expedition to produce the first accurate maps of the region and again in 1922—his first serious attempt to summit, although he was forced to turn back on all three attempts. A sudden avalanche killed seven Sherpas on his third try, sparking accusations of poor judgement on Mallory's part.

Undeterred, Mallory was back in 1924 for the fated Everest expedition that would claim his life at age 37. He aborted his first summit attempt, but on June 4, he and Irvine left Advanced Base Camp (21,330 feet/6500 meters). They reached Camp 5 on June 6, and Camp 6 the following day, before heading out for the summit on June 8. Team member Noel Odell reported seeing the two men climbing either the First or Second Step around 1pm before they were "enveloped in a cloud once more." Nobody ever saw Mallory and Irvine again, although their spent oxygen tanks were found just below the First Step. Climbers also found Irvine's ice axe in 1933.

There were several expeditions that tried to find the climbers' remains. A climber named Frank Smythe thought he spotted a body in 1936, just below the spot where Irvine's ice axe was found, "at precisely the point where Mallory and Irvine would have fallen had they rolled on over the scree slopes," he wrote in a letter that was not discovered until 2013. A Chinese climber reported stumbling across "an English dead" at 26,570 feet (8100 meters) in 1975, but the man was killed in an avalanche the following day before the report could be verified.

Mallorys mummified remains

Mallory's body wasn't found until 1999, when an expedition partially sponsored by Nova and the BBC found the remains on the mountain's north face, at 26,760 feet (8157 meters)—just below where Irvine's axe had been found. The team thought it was Irvine's body and hoped to recover the camera, since there was a chance any photographs could be retrieved to determine once and for all whether Mallory and Irvine reached the summit—thereby changing mountaineering history. But the name tags on the clothing read "G. Leigh Mallory." Personal artifacts confirmed the identity: an altimeter, a pocket knife, snow goggles, a letter, and a bill for climbing equipment from a London supplier.

As the NatGeo documentary shows in quite vivid detail, Mallory's body was exceptionally well-preserved, bleached by the intense sun and essentially mummified from exposure to the elements. There were clear fractures to his right leg—the tibia and fibula, just above the boot (by one account, his right foot was nearly broken off)—and a puncture wound on his forehead the size of a golf ball, which is believed to have caused his death. It's been speculated that the wound was from an errant ice axe bounding off a rock to hit him in the head. There were remnants of a climbing rope around his waist and evidence of trauma from a rope-jerk injury, meaning it's likely he and Irvine were roped together when Mallory slipped and fell. Either the rope snapped or Irvine was forced to cut Mallory loose, since rescue was impossible.

After that exciting discovery, the search was on to find Irvine's body (and the camera) based on the unverified 1975 sighting. A 2001 follow-up expedition did locate the men's last camp. Noted Everest historian Tom Holzel—whose latest research features prominently in Lost on Everest—relied on a 2001 Chinese climber's sighting of a body lying on its back in a narrow crevasse, as well as aerial photography, to pinpoint the most likely spot to search: in the region known as the Yellow Band, at an altitude of 27,641 feet (8,425 meters).

And that brings us to 2019, when the NatGeo crew joined up with a world-renowned team of professional climbers to document their own search for Irvine's body, based on Holzel's latest research. NatGeo photographer Renan Ozturk—also an experienced climber and mountaineer—led the documentary crew, joined by two other seasoned climbers: journalist and adventurer Mark Synnott, (who also penned a feature article for National Geographic about the expedition) and filmmaker Thom Pollard, who was a member of the 1999 expedition that found Mallory's remains.

(Did they find Irvine's body? Spoilers below the gallery.)

  • Team members climb Mt. Everest. Renan Ozturk/National Geographic
  • Sound engineer Jim Hurst at sunrise on the North Col. Hurst opted not to continue for the final push because of altitude sickness.
  • Just before a storm, tents from several expeditions huddle against a snowy slope. North Col camp, 23,000 feet. Hurricane force winds blasted down every tent, carrying one hundreds of feet into the air.
  • Renan Ozturk uses a drone to capture footage during the Everest expedition. Thom Pollard/National Geographic
  • Sunlight touches the top of Mt. Everest.
  • Renan Ozturk (right) pilots a drone at Advanced Base Camp while Matt Irving (left, in red) operates the camera on a separate controller. Thom Pollard/National Geographic
  • Team member plowing forward. Matt Irving/National Geographic
  • Renan Ozturk. Matt Irving/National Geographic
  • A view of tents on the mountainside. Renan Ozturk/National Geographic
  • A view from the push to the summit. Renan Ozturk/National Geographic
  • Team member battling the elements. Matt Irving/National Geographic
  • Navigating a treacherous path Matt Irving/National Geographic
  • A helping hand. Matt Irving/National Geographic
  • A lone team member against a vast expanse of white. Renan Ozturk/National Geographic
  • Renan Ozturk remains on the mountain after the rest of the team descends. Renan Ozturk/National Geographic
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