Carson: Gravity, where does it come from?

[tpfkaw]

It's probably worth pointing out that Carson obviously wasn't literally asking where gravity comes from based on context, and also that while there are theories, science has not yet discovered where gravity comes from.

[tpfkaw]

It hasn't been unified with quantum mechanics, but we do know where it comes from.

That's a rather big caveat. Either there has to be something gravity "comes from" consistent with quantum mechanics (and which has not yet been discovered), or our current understanding of quantum mechanics and/or general relativity must be incorrect. The latter is very unlikely, so it's fair to say that it isn't known "where gravity comes from."