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The volume and speed of the wall of mud, boulders and debris that rushed more than 60 miles down a river through Nepal on Aug. 26 shocked even experienced researchers who study mountains, glaciers and waterways in the Himalayas.
Glacier collapse may have triggered 'almost incomprehensible' Nepal flood
Scientists don't yet know exactly what triggered the Nepal flood, but they suspect a glacier collapse and suggest climate change also played a role.






