In the first moments after the Big Bang, space behaved like an elastic film. It underwent an explosive expansion — inflation (the theory of Alan Guth and Andrei Linde). In some regions, random quantum kicks make this film stretch without stopping — that’s the idea of eternal inflation.
Physicists grew concerned: intense jerks might violate a strict prohibition. You can’t accumulate too much negative energy in one region — much like rubber shouldn’t thin out to its limit. Violating it would render the theory meaningless.
Calculations showed: to break the rule, inflation would need billions of times longer than it takes for this safeguard to kick in. Quantum leaps don’t have time to cause harm. Gravity not only drove the expansion, but also hit the brakes in time. Eternal inflation remains internally consistent.
Gravity worked like a circuit breaker: the same force that caused the rapid swelling of space instantly reversed course when the acceleration became dangerous.
The concept of an ever-inflating fabric of space is reminiscent of the wormholes from the movie ‘Interstellar,’ where curvatures serve as portals between worlds.