Is Mount Everest, the Earth's tallest mountain still growing? What we know

Mount Everest's increasing height is attributed to the isostatic rebound caused by the merger of the Kosi and Arun rivers about 89,000 years ago. According to their estimates, isostatic rebound is responsible for approximately 10% of the yearly uplift rate of Everest. Isostatic rebound is a geological phenomenon that is not limited to the Himalayan region.