re: Do you believe in the Fermi Paradox: The Great Filter?

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At the quantum level the space between the sub-atomic particles that make up matter is enormous compared to the particles themselves so theoretically the particles making up two cars could pass each other in opposite directions without the particles colliding.

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To add to it, all matter from the human race could fit inside of a sugar cube. Atoms are like 99.999999% empty space or something like that. Can’t remember the exact article but I’ve seen it talked about many times.