The height of Mount Everest, the highest peak in the world, is not a static figure. It constantly changes under the influence of complex and sometimes contradictory geological processes. The mountain grows upwards under the action of some forces and is destroyed under the action of others.

Primary Reasons for Height Changes

The change in the height of Mount Everest is the result of the struggle between two main forces: tectonic uplift and erosion. However, recent discoveries have revealed another amazing factor — rivers that can contribute to the growth of mountains.

1. Plate Tectonics: The Foundation of Growth

The main reason for the existence of the Himalayas is the ongoing collision of the Indian and Eurasian tectonic plates, which began about 40-50 million years ago. The Indian plate continues to move northward, \"dipping\" under the Eurasian plate. This compression of the earth's crust leads to its thickening and uplift, which is the main driving force behind the growth of the Himalayas and Mount Everest.

2. Isostatic Rebound and the Influence of Rivers

In 2024, an international group of scientists from University College London and the Chinese University of Geosciences published a study in Nature Geoscience that offers a new explanation for the anomalous height of Mount Everest. They associate this with a phenomenon called \"isostatic rebound.\"

The essence of the phenomenon is as follows: about 89,000 years ago, the river Arun, flowing to the east of Mount Everest, \"captured\" another river system. This led to a sharp increase in the water flow and, as a result, to a significant intensification of erosion. The river began to carry a huge amount of rock and sedimentary materials, deepening its channel and forming deep gorges.

The loss of this mass created an effect similar to that of a ship becoming lighter after unloading. The earth's crust, losing weight, began to \"float\" in a denser mantle. This process of uplift, known as isostatic rebound, led to additional growth not only of Mount Everest but also of neighboring peaks — Lhotse and Makalu.

According to estimates by scientists, Mount Everest has grown by 15-50 meters over the last 89,000 years due to isostatic rebound, and it continues to grow at a rate of up to 2 millimeters per year.

3. Global Warming and the Reduction of Glaciers

On the other hand, climate change also affects the height of Mount Everest. There is data suggesting that global warming promotes the melting of glaciers and snow on the summit and its slopes.

Chinese research conducted since 1966 has shown that by 1999, the height of Mount Everest had decreased from 8,849.75 meters to 8,848.45 meters. This process is associated with the melting of snow, which leads to the compaction of high-altitude glaciers and, as a result, to a decrease in the overall height of the mountain.

Modern Measurements

Accurately measuring the height of Mount Everest is a complex task. Modern technologies, such as GPS navigation, allow for changes to be recorded with high precision, showing that the mountain can rise or fall by millimeters each year. Thus, in 2020, China and Nepal jointly announced a new official height — 8,848.86 meters.

Conclusion

The height of Mount Everest is not just a number on a map. It is the result of a dynamic balance between giant tectonic forces that lift the mountain upwards, the amazing process of isostatic rebound that accelerates this growth, and erosion, as well as climatic changes that \"cut off\" its summit. Everest is alive and changing, and its history is being written right now.
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