Does M theory allow parallel universes to be reached through wormholes?
Yes. M-Theory supports the possibility of higher dimensions in which parallel universes are 3-dimensional membranes (3-branes) suspended in a higher dimensional space (the bulk). [Think of parallel sheets of paper (3-branes) floating in a room (the bulk).] A wormhole in the the higher-dimensional bulk could therefore form a connection between distinct parallel universes. Source: The Physics of Stargates: Parallel Universes, Time Travel and the Enigma of Wormhole Physics, by Enrico Rodrigo (Eridanus Press 2010), p. 28-9.
When an object moves closer to the speed of light, around a wormhole it is possible to travel through time. But it would be a violation of the laws of Motion. But to a person far away from a wormhole it appears that the object in the worm hole appears to be moving faster than the speed of light. Hence time travel is possible through worm holes. For further information watch the YouTube video ” how to travel through time, a documentary by discovery channel.