the two greatest mysteries in all of science in all of science the two greatest mysteries are if one what happened before creation
why did we have a big bang what banged are there other universes a multiverse before the big bang that's outer space then the second mystery is inner space yes what goes on behind your eyeballs we have one hundred billion neurons in your brain
as many as stars in the milky way galaxy
each neuron is connected to ten thousand other neurons and so what is the brain