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I know John likes kool stuff:
What is awesome about them is that their ability to make quite advanced geometrical micro-magnets, is stored in their genome! And they actually invaginate pockets and manufacture into them the magnets. And they actually line up these magnets into almost straight lines within their bodies!
Human beings do similar such manufacturing at cell level, but nothing as advanced!
The big question is WHY? What is the purpose?
Every time I think of magnetism I try to remember this bacteria, perhaps magnetism and life are much more intertwined than we think?