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Michael Jensen's avatar

Wonderful read. Going to make my first ever visit to Gibraltar next month even more interesting. Also, my grandfather always gave me a subscription to Nat Geo, which I loved. Finally, my home state of Washington got not one but two mentions! The Missoula Flood and the earthquake everyone fears.

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Bjorn Hojgaard's avatar

Great read. Really enjoyed it. But one observation: When you talk about the water per second at Niagara Falls, you say that 2,400 cubic metres of water has a weight of 3,100 tons... but that can't be right. Depending on the salinity etc., 2,400 cubic metres of water has a mass very close to 2,400 tons.

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