private_messaging comments on The Octopus, the Dolphin and Us: a Great Filter tale - Less Wrong
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Heh, yeah. But when you don't have transportation and it's just 10 people it may be difficult to find such things without a metal detector... I was just recalling one time I made a little bit of copper from low grade malachite, using a torch. It is really easily reduced from the ore. More easily than iron.