What happens [really] when space expands (as it seems to be doing increasingly rapidly).
If space is quantized, at something like the Planck length, what happens when it expands? Do the space quanta move farther apart? Are additional space quanta created? If so, does that mean that space expands in discrete "jumps" (quanta) corresponding to the Plank length? What do you think? This has big implications for FTL (faster than light travel).