Fine-tuned Universe - We got lucky

in #science6 years ago (edited)


Multiverse-min.png


Fundamental constants

When you think about fundamental constants in nature, like Planck constant, you quickly realize that those are really small numbers.
Then you ask yourself, but why that exact number and what if I can change it somehow?
Would Universe stay more or less the same?

The answer is that we actually don't know for sure, why constants have those particular values, but one thing we know, if you change one of them even for a tiny bit, Universe will look totally different.

Because of this, we say that Universe is fine tuned in a sense that every single constant has just the right value.
So, who set those values? Is it God?

Saying that it is God who is behind this mystery gives us relief but only for a moment, now you have to define God and that's a harder problem to solve.

We are lucky

One possible explanation for the Fine-tuned Universe, which I'm a fan of, is that there is actually 10^500 Universes created after the Big Bang.

When you have that much Universes, each one having different properties (fundamental constants), basic probability theory tells us that it is very likely that there will be at least one Universe in which constants are just right for complex life to emerge.

We are happy to live in one such Universe! There might be other Universes unlike ours, with totally different properties but still with right conditions that allow complexity to emerge.

Huge majority of Universes might be totally boring without atoms, elements, planets and galaxies like ours. Just cloud of particles and who knows what. Nothing really interesting happens in those Universes.
But in some Universes, everything is just right, and the fact that you and me exist proves it.

Appreciate how unique this place is. Who knows how many places there are, that are not even close to what we have here.

Cheers!

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