Mount Everest, the world’s tallest peak at 8.85 kilometers, is still growing, according to a new study published in Nature Geoscience. Led by geoscientist Jin-Gen Dai from China University of Geosciences, the research suggests that the mountain’s growth is accelerating due to changes in regional river systems.
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Approximately 89,000 years ago, the Kosi and Arun rivers merged, significantly increasing erosion in the surrounding areas. This process, known as isostatic rebound, has led to the rising of Everest as the Earth’s crust adjusts to the reduced weight caused by erosion. The phenomenon is likened to a boat rising in water when weight is removed.
The study estimates that isostatic rebound accounts for around 10% of Everest’s annual uplift, contributing to a rise of 0.2 to 0.5 millimeters each year. Over time, this process could outpace the surface erosion caused by natural elements like wind and rain.
Neighboring peaks, including Lhotse and Makalu, are also experiencing similar growth, with Makalu’s uplift slightly exceeding Everest’s due to its proximity to the Arun River. Co-author Adam Smith, a doctoral student at University College London, confirmed through GPS data that the entire Himalayan range continues to rise.
The study emphasizes the ever-changing nature of Earth, illustrating how even seemingly unchanging landmarks are shaped by ongoing geological processes.