Pazuzu@midwest.social explained above:
The original post only gave half the explanation. It’s not that lead exists in general, it’s that lead exists within zircon crystals.
Under normal circumstances that would be impossible, zircon crystals strongly reject lead atoms as they form. There’s no way to stuff lead into the crystal lattice in the quantity we find them there. But uranium and zircon go together just fine, we just have to wait for it to decay into lead. The trouble is it takes ~4.5 billion years for just half of those uranium atoms to turn into lead. So any zircon crystal we find with half as much lead as uranium must be roughly that old
Doesn’t look like a balanced test group to me. Do they have any idea what might cause these cognitive deficits? Or is it just wrong self evaluation like this stupid vaccines cause autism study from 1990?
Don’t take me wrong, COVID was horrible and all to real, but I don’t believe these 1 in 4 people with mild cases have long lasting cognitive deficits bullshit. At least not if it is “proven” with studies like this