Peak metal

I was swimming today and thinking about peak helium, which seems vaguely funny and yet its consequences would be anything but, and here's a post on peak iridium and peak zinc. I don't believe that this planet was "designed" to do anything, but we design our lives as though it were true. But if it were true, then it seems that Earth is not "designed" to hold six billion humans with the lifestyle we happen to have right at the moment.

On the optimistic side, I think we outlive our design purposes.

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