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TIL about the Baghdad Batteries. In 1938 twelve jars with copper cylinders and iron rods were found in Iraq. The jars when combined with grape juice produce approximately 1 volt of electricity. It is hypothesized these were the first batteries ever created, over two thousand years ago.
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whatilearned
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TIL about “silence”, a proposed 9c (5.15d) climb in Norway, which would make it the hardest climb in the world. As of this day, Adam Ondra was the only person able to complete it, after 5 years of preparation and a combined 40 days of climbing, spread over 7 visits from 2016 to 2017.
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whatilearned
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