efiler@lemmy.worldtoAsklemmy@lemmy.ml•How come rust built up on iron things looks like a thick crust, but somehow when it's removed it's like there's nothing gone from the original?
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1 year agoJust want to add, that rust is not pure iron oxide(? can’t do chemistry in english) but also contains water molecules
At least the “medieval warm period” which gets cited a lot, was a regional phenomenon and global temperatures are higher today. The Wikipedia page seems to suggest the same for the Roman warm period.