May be this experiment will be able tell us soon(adsbygoogle = window.adsbygoogle || []).push({});

https://www.sciencedaily.com/releases/2016/04/160422115329.htm

One of the problems to be solved in this respect is that if space-time is granular beyond a certain scale it means that there is a "basic scale," a fundamental unit that cannot be broken down into anything smaller, a hypothesis that clashes with Einstein's theory of special relativity.

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# I Is spacetime granular?

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