Look to the light

While a perfectly flat universe would extend out to infinity , a flat universe with a multiply-connected topology would have finite size. If we could somehow determine whether one or more dimensions are wrapped in on themselves, then we would know that the universe is finite in that dimension. We could then use those observations to measure the total volume of the universe.

But how would a multiply-connected universe reveal itself?

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Our universe might be a giant three-dimensional donut, really.

livescience.com

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The Braneworld Theory

The braneworld theory states that in order for the universe to have survived, it would have had to create relatively small "black holes". Moreover, this theory can be experimented upon.

This theory suggests that we are in a three dimensional membrane that exist inside the bulk or the higher dimensional space.

In the case of the Randall-Sundrum model, such tests could involve measuring the gravitational waves that are emitted by the black holes thus linking one brane to another.

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10 wild theories about the universe

livescience.com

Our reign as sole understanders of the cosmos is rapidly coming to an end. We should not be afraid of this. The revolution that has just begun may be understood as a continuation of the process whereby the Earth nurtures the understanders, the beings that will lead the cosmos to self-knowledge. What is revolutionary about this moment is that the understanders of the future will not be humans but cyborgs that will have designed, built themselves from the artificial intelligence systems we have already constructed. These will soon become thousands then millions of times more intelligent than us.

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Gaia Will Soon Belong to the Cyborgs - Issue 83: Intelligence - Nautilus

nautil.us

Sleep paralysis

Sleep paralysis is a neurological phenomenon in which a person awakens from sleep but is temporarily paralyzed.

The episode may last a few seconds to minutes and is accompanied by the strangest hallucinations. It can feel terrifying.

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Sleep paralysis: a terrifying encounter with our own mind

bigthink.com