Physicists have theorized the possibility of what they are calling “bubbles of nothing” that could potentially eat spacetime and destroy our universe.
The good news is that the timeframe of such an occurrence is very likely not in our lifetime, nor that of many generations after us.
With a basis in string theory, the idea that a bubble of nothingness could form is related to the fact that our universe is a “false vacuum”–which means it seems like a vacuum, but it’s not entirely stable. But the universe is “stable enough,” which means that on a timescale of millennia, we’re unlikely to see any change in the stability. However, “If a bubble of nothing spontaneously forms in false-vacuum spacetime, it will grow and eventually swallow the entire universe.” And it’s a pretty big “If”.
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