By: Patrick Karanja, Jewel Technical College
Mount Everest is the highest mountain above sea level on Earth. It is located in the Himalayas on the border between Nepal and Tibet. The mountain has an elevation of about 8,848.86 meters (29,031.7 feet) above sea level. This height is the reason it is recognized as the tallest mountain in the world.
Mountain elevation is commonly measured from sea level, which represents the average level of the world’s oceans and serves as the standard reference for measuring height. Using this method, Mount Everest rises higher above sea level than any other mountain on Earth.
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The formation of Mount Everest is linked to geological processes described by the scientific concept of Plate Tectonics. Millions of years ago, the landmass that is now the Indian subcontinent moved northward and collided with the Eurasian continent. This collision caused the Earth’s crust to fold and rise, forming the Himalayas.
The continued pressure between the Indian and Eurasian tectonic plates created some of the highest mountains on Earth, including Mount Everest. Scientific measurements indicate that Everest continues to rise slightly each year due to ongoing tectonic movement.
Geological studies have also shown that some rocks near the summit contain fossils of marine organisms. This indicates that these rock layers were once part of an ancient ocean floor before being uplifted by tectonic activity.
Although Mount Everest is the highest mountain above sea level, it is not the tallest when measured from base to summit. Mauna Kea in Hawaii measures over 10,000 meters from its base on the ocean floor to its peak. However, because most of Mauna Kea is underwater, its elevation above sea level is about 4,207 meters, which is lower than that of Mount Everest.

Conditions at the summit of Mount Everest are extreme. The air contains significantly less oxygen than at sea level, and temperatures can drop below −60°C. Strong winds are also common at high altitudes. The first confirmed successful ascent of the mountain took place in 1953 by Edmund Hillary and Tenzing Norgay.
Mount Everest is also known by different local names. In Nepal it is called Sagarmatha, and in Tibet it is known as Chomolungma.
In summary, Mount Everest is recognized as the tallest mountain in the world because it has the greatest elevation above sea level. Its height is the result of long-term tectonic processes that formed the Himalayan mountain range.
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