What is string theory? @WorldScienceU
What is string theory? @WorldScienceU
Uploaded September 2017 | Updated September 2026, 1 week ago
What is the smallest thing in the universe? For a long time, it was the atom. Then scientists discovered subatomic particles like quarks. Is there anything smaller? Physicist Brian Greene explains String Theory, which looks to find out what the very fabric of the cosmos is made out of.

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What is string theory?

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