This stuff gets better all the time. From Phys.org:
One problem is that conventional physics doesn’t really account for why the universe is so large, Arkani-Hamed said.
Albert Einstein’s theory of relativity showed that a huge amount of energy exists in the vacuum of space, and it should curve space and time. In fact, there should be so much curvature that the universe is a tiny, crumpled ball.
“That should make the universe horrendously different than what it is,” Arkani-Hamed said.
But quantum mechanics also poses a problem. The theory is good at describing the very small realm of particle physics, but it breaks down when physicists try to apply it to the universe as a whole.
“Everything that quantum mechanics is, is violated by our universe because we’re accelerating (referring to the idea that the universe is expanding) – we don’t know what the rules are,” Arkani-Hamed said. “When you try to apply quantum mechanics to the entire universe, quantum mechanics cries ‘uncle.'”
That guy’s name rang a bell. This from late 2013:
Nima Arkani-Hamed and others have proposed over 10^500 universes because fewer of them would not obviate fine-tuning. Why believe in them? As a New Scientist writer has explained
But the main reason for believing in an ensemble of universes is that it could explain why the laws governing our Universe appear to be so finely turned for our existence … This fine-tuning has two possible explanations. Either the Universe was designed specifically for us by a creator or there is a multitude of universes—a multiverse.
Cosmologists deserve credit for making the choice so clear. In that spirit, Discover Magazine offers the multiverse as “Science’s Alternative to an Intelligent Creator” (2008). More.
Okay. More boldly go. Then detox before you come back.
It matters that this stuff is considered “science” today.
See also: The Science Fictions series at your fingertips (cosmology).
In search of a road to reality