The Entire Universe Could Exist Inside a Black Hole – Here's Why

I&#x27;ve seen this theory pop up a lot the past few weeks. So intriguing, so many questions!<p>How big would the _outer_ black hole be? Would all the mass&#x2F;energy we have in our universe have to correlate to the same amount of mass&#x2F;energy that went in the outer black hole? If so: would that mean the outer universe might have a lot more energy than ours?<p>Would that mean black holes in our universe might house little baby universes that have as much mass&#x2F;energy as the star that imploded + everything that fell into the black hole?<p>Is it black holes all the way down... or up? What happens if our great-great-great-grand-parent-black-hole evaporates, do all the nested black holes disappear in an instant?

I would avoid these flights of fancy until we better understand dark matter and the intergalactic voids.

If you’re claustrophobic, this article probably isn’t for you :)