In 1999, the Mallory and Irvine Research Expedition, sponsored in part by the TV show Nova and the BBC, and organised and led by Eric Simonson, arrived at Everest to search for the lost pair. Guided by the research of Jochen Hemmleb, within hours of beginning the search on 1 May, Conrad Anker found a frozen body at 26,760 ft (8,157 m) on the north face of the mountain. As the body was found below where Irvine's axe had been found in 1933 at 27,760 ft (8,461.25 m), the team expected it to be Irvine's, and were hoping to recover the camera that he had reportedly carried with him. They were surprised to find that name tags on the body's clothing bore the name of "G. Leigh Mallory." The body was well preserved, due to the freezing conditions. A brass altimeter, a stag-handled lambsfoot pocket knife with leather slip-case, and an unbroken pair of snow-goggles were recovered from the pockets of the clothing. Personal effects, including a letter and a bill from a London supplier of climbing equipment, confirmed the identity of the body. The team could not, however, locate the camera that the two climbers took to document their final summit attempt. Experts from Kodak have said that if a camera is ever found, some chance exists that its film could be developed to produce printable images, if extraordinary measures are taken, and have provided guidance as to handling of such a camera and the film inside, in the event that such were found in the investigation. Before leaving the site of Mallory's death, the expedition conducted an Anglican service for the climber and covered his remains with a cairn on the mountain.
The 1999 research team returned to the mountain in 2001 to conduct further research. They discovered Mallory and Irvine's last camp, but failed to find either Irvine or a camera. Another initiative in 2004 also proved fruitless.
Conrad Anker, who found Mallory's body in 1999, free climbed the Second Step in 2007 and has worn replica 1924 climbing gear on Everest, said he believes, "It's possible, but highly improbable, that they made it to the top", citing the difficulty of the Second Step and the position of Mallory's body. He stated that, in his opinion: