A rocket can't travel faster than the speed of light.
What would happen if you sent off a rocket going at 0.5c in one direction, and then sent off another rocket going at 0.5c in the opposite direction?
Wouldn't one be travelling at the speed of light, relative to the other?
If an alien species produced memories using process involving an overall negative entropy change, would it have memories from our future?
It would appear to us as though these alien memories were being destroyed with an overall positive entropy change (since in our perception every reaction...