> Black holes are wrapped in event horizons. Not really - the event horizon is the effect of the black hole, not something separate from it. Also, from one per

> Black holes are wrapped in event horizons. Not really - the event horizon is the effect of the black hole, not something separate from it. Also, from one perspective there is nothing mysterious about it - an observer passing through it would not notice any kind of border there (though an observer who is not passing through it would see it as some kind of barrier emitting Hawking radiation). Also note that physicists do not believe that there is any infinity at the center of a black hole. With a theory of quantum gravity we may even be able to describe the structure of the core of a black hole (though it would remain forever an un-testable model). Just like classical mechanics allows a particle to gain unbounded speed, GR allows a mass to gain unbounded gravity, but that is likely incorrect, we just don't know how to describe the limit yet. > The digits of pi would require all the energy of the universe to calculate. This makes no sense - pi has an infinite number of digits, so all of the energy in the universe can't possibly be enough to compute it. > Calculating the brain with sufficient accuracy (using our current computational framework) would require a computer so large it would generate a black hole... I find this hard to believe. Regardless, there is no infinity in the human brain. Note that in general infinity is an inherently non-scientific concept - there is no way to experimentally distinguish an infinity from a quantity larger than the largest possible experiment.