 Mount Everest, Earth's highest mountain, has been host to numerous tragedies; over 300 have died on the mountain, with deaths occurring every year since 1978.The most notable events occurred during the 1922 British Mount Everest Expedition, 1970 Everest Disaster, 1974 Everest Disaster, 1996 Everest Disaster, 2014 Mount Everest avalanche, and 2015 Mount Everest avalanches.K2 is the world's second highest mountain.