If you said “with the Big Bang,” congratulations: that was our best answer as of ~1979. Here’s what we’ve learned in all the time since.

  • The idea that somewhere inflation is continuing to produce new universes is intriguing. Will they be similar to our universe or have less energy because inflation continued for longer?

    Also, the article says we can’t reach them because inflation has pushed them too far away from us. But what if we tried to go there anyway? What exists between us?

    • The universe is expanding faster than the speed of light. So what exists between us and distant objects is the future distance between us and distant objects.

      Imagine chasing a balloon floating north on a long airport treadmill pulling you south. It’s faster than you could ever hope to run, so the distance between you and the balloon will only ever grow.

      This is a sort of analogous metaphor for what would happen if you tried to go to distant objects.