People on earth have literally been led to these discoveries, many of which later became perverted by humanity to use for its own destruction. The mushroom cloud of the atomic bomb is one of the holiest archetypes created by human beings. It, more than any religion or philosophy on earth, brought humanity together all of a sudden, to a new level of consciousness. The power behind the atom is the power of God - the Force that holds all things together. Space and time are illusions that hold us to this earth plane.
Time travel is possible in the afterlife.
There is no beginning, middle or end to time. Time is not linear. Time is the eternal now. Television-like devices exist in the afterlife where people can view the future. In the spiritual universe, our earth time is meaningless.