The universe’s continued existence implies extra dimensions are tiny
Any extra dimensions are too tiny to create mini black holes that can blink us out of existence
![bursting bubble illustration](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/10/092618_LG_tiny-black-hole_feat.jpg?fit=860%2C460&ssl=1)
POP GOES THE UNIVERSE If extra dimensions were large enough, a universe with different laws of physics could bubble up from the death of a black hole. That would be bad news for us: The new version would be uninhabitable.
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