Neil deGrasse Tyson

No one trusts your decisions you make until you're at least 20.

And even then, for some people, never...

All right, Chuck, give me more.

You'd embed the simulation with evidence that that simulation scientist would then interpret as an old universe.

Yeah.

But it's all just fake.

Got you.

Right, so when we had a great revelation when computing power

was adopted by astrophysicists in the 1970s.

We were early out of the box on this.

There were these galaxies in the universe that were kind of funky looking, and we made catalogs called Peculiar Galaxies.

We didn't, you know, maybe just thought galaxies were made that way.

Only after we were able to simulate the collision of two galaxies did we realize that this is like the crash scene leftovers of what happens when galaxies collide.

And we simulate...

billion years in a matter of minutes.

And in so doing, we were able to populate the entire catalog of galaxy parts and nasty, twisted-looking galaxy forms simply by seeing what happens when they collide and speeding up the time to do so.

That's just a little aside.

Oh, that's a philosophical challenge.

That's like saying, how detailed do you want your map to be?

If you have a map the size of the UK, then it'd have all the detail of the actual island.