The Watership Down rabbits removed an additional 0.1 nanometers constructing their warren, although that was mostly soil. British rabbits have historically mined very little coal; the sole rabbit-run coal plant was shut down in the 1990s.

https://explainxkcd.com/2992/

  • Alex
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    7 hours ago

    We still have a lot of slag heaps in the top of some of our local hills. They make for some interesting mountain bike runs but they aren’t exactly diverse in floor coverage. Some pits are now tourist attractions but I don’t know what ongoing work is done to maintain the abandoned ones.