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Do you believe in oxygen?

If it's invisible how do we know its even real??
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Sicarium · 46-50, M
An oxygen molecule isn't invisible, just really small. You can see an individual molecule with advanced microscopes.

BlackHeart · 31-35, M
@Sicarium no way thats just what "they" want you to think. Dont be a sheep ma'an be a wolf bro.. Oxygen isnt real its a lie