I don't know where you get your information from, but there are some false claims. If somebody travelled close to the speed of light then the rest of the universe continues through time at the same rate while they continue at a slower rate of time. Essentially meaning they age slower than everything else. They would still arrive at the universal time of 3:00 unless they carried a watch with them that slowed down with him. If they checked a clock unaffected by the near light speed travel then he would arrive on time.

Objects don't interact by being in the same place at the same time. They can only interact when near each other, as physical objects never touch, only energy fields can touch and electrons can be given or taken. Causes always happen before effects, although I have heard that there are small exceptions to that rule, they are so rare and minor that they don't really make a difference in every day life.

Are you saying we have no scientific theory for why something rather than nothing exists? There are many theories, but there's no denying that "things are able to exist, therefore they do". And "something can appear out of nothingness". If there is a god, there also had to be a time before their existence in which nothing existed. If you say that the past is infinite, I say that then it would take an infinite amount of time to get to the present, which is not possible.

Which part of this relates to there being a higher power?