B-12 was replacement for cobalt glass. Can't patent cobalt. - Conspiracies

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B-12 was replacement for cobalt glass. Can't patent cobalt. (twitter.com)

posted 104 days ago by Dps1879 104 days ago by Dps1879 +12 / -2

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– Dregan_ya 4 points 103 days ago +4 / -0

It's also why these beautiful cathedrals used coloured stained glass windows with symatic designs all across the realm.

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