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Isolated brains could randomly fluctuate into existence: Imagine you're an isolated brain floating lonely through the vast expanse of the Universe with all your thoughts and perceptions just figments of your imagination. There'd even be a name for you: you'd be a Boltzmann brain. Boltzmann brains are of interest to physicists, in particular to cosmologists. The idea is that, according to quantum mechanics, there is energy in empty space which can fluctuate, producing particles as it does so.

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A radical new view of quantum mechanics does away with an eternal "bubble" multiverse, and suggests how the "many worlds" multiverse will come to an end. Sean Carroll of CalTech does away with some troubling paradoxes such as "Boltzmann brains" by giving us a new way of looking at quantum fluctuations.

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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.

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from National Geographic

Brain Pictures, Brain Photos

A coach must be knowledgeable. He must know the rules of the game and how to play it. He needs to be able to take the rules and use them to win such as running down the clock, taking a knee, and the many more specific things smart coaches do.

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