The top answer given here is highly reductionist to the point of misleading. This question comes up regularly in Physics SE, if you’re interested I suggest you check out the answers to the following:
Second one has a highly upvoted but controversial answer by Lubos Motl.
This question is similar, I think, to others like “why is there a speed limit in the universe” and “does light slow down in a material” that are I doubly muddled for science enthusiasts because (1) they are concepts that require deep domain knowledge, (2) even for some who have (1) they’ve been biased by decades of well meaning but harmful educational aides.
https://physics.stackexchange.com/questions/219306/if-gravit...
https://physics.stackexchange.com/questions/61899/why-do-we-...
Second one has a highly upvoted but controversial answer by Lubos Motl.
This question is similar, I think, to others like “why is there a speed limit in the universe” and “does light slow down in a material” that are I doubly muddled for science enthusiasts because (1) they are concepts that require deep domain knowledge, (2) even for some who have (1) they’ve been biased by decades of well meaning but harmful educational aides.