Mountaineers scaled Mt. Everest in less than a week with help from an anesthetic gas. Critics warn it’s dangerous

Mountaineers scaled Mt. Everest in less than a week with help from an anesthetic gas. Critics warn it’s dangerous

Mountaineers usually spend weeks or months acclimating to high altitudes before ascending Mt. Everest. But one group accomplished the feat in less than a week after using an anesthetic gas that critics warn could be dangerous.