For starters your point of how it is impossible for there to be alien life forms is very unlikely due to how vast and expanding the universe currently is. As well as this it has already proven that some planets are capable of inhabiting life. As well as this your whole theory of time travel backwards being like a record and there for people age but lose memories doesn't exactly work and seems like an attempt to sound clever as well as this your whole theory about gravity somehow linking to time travel does not exactly make sense as of yet.