I haven’t had time to verify this report with another source, but it seems plausible and interesting enough to warrant mention. Basically, it appears that there is a deep flow of groundwater four kilometers (2.5 miles) below the Amazon River, following the same general course but much wider and far slower. It carries only about three percent of the flow of the Amazon, the largest river on Earth, but that’s still a lot of water — enough to supply the freshwater needs of nearly a hundred New York Cities if the information in the article is correct.

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