If you think about it, physics has always advanced because of strange little clues that didn’t seem to fit. Mercury’s orbit was off by a tiny fraction; that small mismatch eventually gave us Einstein’s theory of relativity.
The ultraviolet catastrophe in blackbody radiation didn’t make sense because the crisis opened the door to quantum mechanics. So whenever something doesn’t quite add up, it’s worth paying attention. Extra dimensions enter the story because of exactly this kind of mismatch.
If extra dimensions are real, then the forces of nature might not be as separate as they look. Gravity might only appear weak because it’s spread across hidden dimensions, while the other forces are stuck to the space we can see. That would mean unification: the dream of combining all forces under one theory isn’t just possible, but natural.
Thank you for watching.
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Timestamps.
0:00 Extra Dimensions.






