We're all living in a black hole: The bold theory scientists can't disprove

I find the interesting bit is really this:<p><i>if we calculate the size of a black hole with mass and energy equal to all the mass and energy we can see in the Universe, we get a surprising result: it’s almost the same size of the observable Universe!</i><p><i>If this seems odd, remember that a black hole’s radius is directly proportional to its mass, while its volume is proportional to its radius cubed.</i>

Kurzgesagt has a good video about this: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=71eUes30gwc" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=71eUes30gwc</a>

Perhaps we&#x27;re living in a black hole within a black hole!<p>Or worse: it&#x27;s black holes all the way down!