Mountaineer and journey filmmaker David Breashears, greatest identified for an IMAX documentary about climbing Mount Everest, has died aged 68.

Breashears was discovered unresponsive at his residence in Massachusetts on Thursday and died of pure causes, mentioned his enterprise supervisor Ellen Golbranson.

She added that “the exact cause of death remains unknown at this time”.

Breashears was an skilled mountaineered who climbed the world’s most difficult peaks. As a cinematographer he labored on documentaries and have movies.

According to his web site, in 1983, he transmitted the primary stay tv photos from the summit of Everest, and in 1985 he grew to become the primary American to achieve the summit twice.

Breashears reached the summit of Mount Everest 5 instances in whole, his household mentioned.

“He combined his passion for climbing and photography to become one of the world’s most admired adventure filmmakers,” they mentioned in a press release.

He is greatest identified for a 1998 IMAX documentary known as Everest, which he co-directed and co-produced, concerning the challenges and struggles of a gaggle of mountaineers making an attempt to achieve the height of the mountain, which at 8,850m (29,035ft) is the world’s tallest.

Breashears and his workforce had been filming the documentary in May 1996 when a blizzard struck the mountain, killing eight climbers.

He and his workforce stopped filming to assist the climbers.

In 2007, Breashears based GlacierWorks, which on Facebook described itself as a non-profit organisation highlighting adjustments to Himalayan glaciers “through art, science, and adventure”.

His household mentioned “he used his climbing and photography experience to create unique records revealing the dramatic effects of climate change on the historic mountain range”.