Everest has gained as much as an extra 50m/165ft in elevation as the planet’s crust adjusts due to erosion from a river

>Mount Everest, the tallest mountain in the world, has been growing ever higher for roughly 50 million years. The peak, also called Chomolungma in Tibetan or Sagarmatha in Nepali, is part of the Himalayan range that has been uplifting as the tectonic plate under the Indian subcontinent collides with the rest of Asia.

>The counterintuitive cause appears to be erosion due to a merger of rivers located about 47 miles away from Everest. Rivers in steep mountains like the Himalayas remove vast amounts of rock from the range. While it might seem that this process would work against the mountain’s height, it actually has the opposite effect on the Earth’s crust.

Paper: [Recent uplift of Chomolungma enhanced by river drainage piracy | Nature Geoscience](https://www.nature.com/articles/s41561-024-01535-w)

That was unexpected to me. Very interesting

>We suggest that part of Chomolungma’s anomalous elevation (~15–50 m) can be explained as the isostatic response to capture-triggered river incision

Google:

>Stream capture, river capture, river piracy or stream piracy is a geomorphological phenomenon occurring when a stream or river drainage system or watershed is diverted from its own bed, and flows down to the bed of a neighbouring stream.