climbing Everest is now an option for anyone who can afford the trip (over US $60,000), although they need to be in very good shape and understand that the mountain carries a lot of risk.
The climate of Mount Everest is naturally extreme. In January, the coldest month, the summit temperature averages -36° C (-33° F) and can drop as low as -60° C (-76° F). In July, the warmest month, the average summit temperature is -19° C (-2° F). At no time of the year does the temperature on the summit rise above freezing.
it's not without its risks; most of which stem from the extremely low Oxygen content in the air in "The Death Zone" above 22,000 ft. While conditions for any area classified as a death zone apply to Mount Everest (altitudes higher than 8,000 m), it is significantly more difficult for a climber to survive at the death zone on Mount Everest. Temperatures can dip to very low levels, resulting in frostbite of any body part exposed to the air. Because temperatures are so low, snow is well-frozen in certain areas and death by slipping and falling can also occur. High winds at these altitudes on Everest are also a potential threat to climbers. The atmospheric pressure at the top of Everest is about a third of sea level pressure, meaning there is about a third as much oxygen available to breathe as at sea level.[
When Jon Krakauer reached the summit of Mt. Everest in the early afternoon of May 10, 1996, he hadn't slept in fifty seven hours and was reeling from the brain-altering affects of oxygen depletion. As he turned to begin his long, dangerous descent from 29,028 feet, twenty other climbers were still pushing doggedly toward the top. No one had noticed that the sky had begun to fill with clouds. Six hours later and 3,000 feet lower, as the storm swept the peak with seventy knot winds and blinding snow, Krakauer collapsed in his tent, freezing, hallucinating from exhaustion and hypoxia, but safe. The following morning he awakened to learn that six of his companions hadn't made it back to their camp, and were in a desperate struggle for their lives. When the storm finally passed, five of his fellow climbers would be dead, and the sixth was so horribly frostbitten that he would have both of his hands and nose amputated after a dangerous helicopter rescue at 20,000 feet. By the time all expeditions had quit the mountain and departed Nepal, twelve people had perished on the slopes of Everest.
Life-threatening thefts
Other climbers have reported life-threatening thefts from supply caches. Vitor Negrete, the first Brazilian to climb Everest without oxygen and part of David Sharp's party, died during his descent, and theft from his high-altitude camp may have contributed.[17]
Euophrys omnisuperstes, a minute black jumping spider, has been found at elevations as high as 6,700 meters, possibly making it the highest known permanent resident on earth. They lurk in crevices and possibly feed on frozen insects that have been blown there by the wind.
Birds, such as the bar-headed goose have been seen flying at the higher altitudes of the mountain, while others such as the Chough have been spotted at high levels on the mountain itself, scavenging on food, or even corpses, left over by climbing expeditions.
Facts
As of the end of the 2004 climbing season, 2,238 people had reached the summit (1,148 of them since 1998) and 186 people died while summitting. The conditions on the mountain are so difficult that most of the corpses have been left where they fell; some of them are easily visible from the standard climbing routes.
Most expeditions use oxygen masks and tanks [13] above 26,246 feet (8,000 m); this region is known as the death zone. Everest can be climbed without supplementary oxygen but this increases the risk to the climber. Humans do not think clearly with low oxygen, and the combination of severe weather, low temperatures, and steep slopes often require quick, accurate decisions.
Mountain climbers are a significant source of tourist revenue for Nepal; they range from experienced mountaineers to relative novices who count on their paid guides to get them to the top. The Nepalese government also requires a permit from all prospective climbers; this carries a heavy fee, often more than $25,000 per person.[4]
sorry, I wrote that in another post but thought it bore repeating}.
