String theory may limit space brain threat
LEGIONS of disembodied brains floating in deep space threaten to undermine our understanding of the universe. New mathematical modelling suggests string theory and its multiple universes may just provide our salvation – and that could win the controversial theory a few more backers.
Physicists have dreamed up some bizarre ideas over the years, but a decade or so ago they outdid themselves with the concept of Boltzmann brains – fully formed, conscious entities that form spontaneously in outer space.
It may seem impossible for a brain to blink into existence, but the laws of physics don't rule it out entirely. All it requires is a vast amount of time. Eventually, a random chunk of matter and energy will happen to come together in the form of a working mind. It's the same logic that says a million monkeys working on a million typewriters will replicate the complete works of Shakespeare, if you leave them long enough.
