as you nowthe string theory is very possible but what would happen if the universe became so big that it actually

Question: as you nowthe string theory is very possible but what would happen if the universe became so big that it actually started to hit other galaxies or universes?
- Keywords:
  expansion,
  space,
  string theory,
  universe
Asked by fantasyblade to Ed, Hayley, Jason, Nathan, Sophie on 20 Mar 2013.
- Edward Bovill answered on 20 Mar 2013:
  
  If sting theory is correct and there are other universes out there, then they wouldn’t actually share the same dimensions as we have in our universe. Unfortunately, this means that they can never come into contact with our universe in any way.

Question: as you nowthe string theory is very possible but what would happen if the universe became so big that it actually started to hit other galaxies or universes?