I mean if I drop a rock into a lake, its makes circles and the outermost circles are the oldest. Or if I blow something up, the furthest debris is the oldest.
In: Physics
Me: Does a bubble have a center?
Kid: Yeah, the very middle. The inside.
Me: That’s correct. Do you think the surface of the bubble has a center?
Kid: I don’t understand.
Me: Can you take a pen, and draw a dot on the surface that is the center of that bubble?
Kid: No, that’s silly.
Me: You’re right. The idea is silly. But what if we shrink the bubble?
Kid: It gets smaller.
Me: What if we shank it down to the center of the entire bubble?
Kid: Then there’s no bubble. There’s no more surface.
Me: That’s true. But from another perspective, every single point on the surface of the bubble is now at the center.
Kid: But there is no surface.
Me: You’re right. There is nothing there. The big bang is like that. From an infinitely tiny point, the entire surface of the bubble appeared.
Looking at the universe, every single point. Every up and down, left and right, and side to side. If we went backwards in time, all of it would squish and squish until it all landed on the center. *Everywhere* was at the center, and *everywhere* spread out and away from the center.
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