Clues to ancient Kosi superflood say it could happen again today
At Rajiv Sinha’s laboratory in IIT Kanpur lie soil, sand, and rocks drilled out from across thousands of metres under the Karnali, Ganga, and Kosi rivers. Each sample, called a “sedimentary core” is held in a container 7.6 cm wide; together, they create snapshots of the rivers’ ancient history. Every centimetre of these cores reveals…
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