Mount Everest is Still Growing Taller

The majestic Himalayas, home to Earth's highest peaks, are far from static. These colossal mountains, including the towering Mount Everest, are a testament to the planet's enduring geological activity, continuously being sculpted by forces deep within the Earth. This remarkable growth is primarily a consequence of the ongoing collision between two colossal landmasses: the Indian and Eurasian tectonic plates.

Roughly 50 million years ago, the Indian subcontinent began its northward drift, eventually slamming into the Eurasian plate. This immense, slow-motion impact crumpled the Earth's crust, thrusting layers of rock skyward and forming the vast mountain range we know today as the Himalayas. This tectonic dance hasn't ceased; the Indian plate continues to burrow beneath the Eurasian plate at a rate of approximately 5 centimeters per year, perpetually pushing the mountains higher. This relentless geological pressure contributes to Everest's incremental increase in elevation, adding several millimeters to its height each year.

Adding another fascinating layer to this phenomenon is the concept of isostatic rebound. While erosion might seem to wear mountains down, in Everest's case, it paradoxically aids its growth. Powerful river systems, such as the Arun and Kosi, carve deep gorges, removing vast quantities of rock and sediment from the surrounding landscape. This reduction in weight causes the Earth's crust to "float" higher on the underlying mantle, much like a ship rising when cargo is removed. This process, known as isostatic rebound, can contribute significantly to the mountain's uplift, with some studies suggesting it adds up to 2 millimeters a year and has increased Everest's height by 15 to 50 meters over the last 89,000 years.

The dynamic nature of Everest's height is reflected in its official measurements. For decades, the widely accepted height was 8,848 meters. However, with advancements in technology and further surveys, including a joint effort by China and Nepal, the mountain's new official height was announced in 2020 as 8,848.86 meters (29,031.7 feet), confirming its continuous, albeit subtle, ascent.