Ueli Steck (1976 - 2017)

Ueli Steck, a famous Swiss climber, died Sunday, April 30, 2017, on Mount Everest, according to multiple news sources. He was 40.

Steck died while acclimatizing for an attempt on Everest without oxygen by a new route. He was called the Swiss Machine for his methodical approach and his ability to keep going even after pushing himself to the limits of human endurance.

Expedition organizers told CNN that Steck died when he slipped from a slope and fell into a crevasse at around 6,600 meters (about 4.1 miles) on Mount Nuptse. His body has been recovered from the mountain.

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On April 26, Steck wrote on his Facebook page that he had a "quick day from Basecamp up to 7,000m and back" and believed "active acclimatisation" was the best way of getting used to high altitude.

Steck was known for his rapid ascents and versatility. The climber held several records, including ascending the north face of the Eiger in the Bernese Alps in less than three hours.

He won the Piolet d'Or, mountaineering's highest honor, in 2009 and 2014.

Steck helped popularize climbing by posting exciting videos of his exploits.

British mountaineer Kenton Cool described Steck as "a true inspiration" who "showed us all what was possible in the mountains and beyond."

The British Mountaineering Council said he was a "legendary mountaineer and all-round great guy."

Famous climber Alan Arnette paid tribute to Steck on his website: "My deep condolences to all of Ueli's family, friends and admirers around the world. This is a truly tragic day in mountaineering."

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