Don't we though? What about dark matter and it's relativity to pushing things apart?,The Higgsfield and Higgs particle?, or teleportation which exists on two islands on the earth via laser. Cloning of an atom( technically) then shooting it to where it needs to go via laser with a receiver.. Although one atom Must be destroyed in the process they share a bond. For every atom there is another that shares a bond with it and no matter how far apart they are they still attract one another. So we know gravitational bonds exist, we know there is gravity and anti gravity and they are very closely related mass or lack of a particle and I totally forgot the rest. This is why I didn't go to Yale. I've completely forgotten my Sources and details. Allwell. Point is, we know a lot, even enough to create artificial gravity in several different ways but none on how to get rid of gravity other than using light materials. What about that cloud jello ultra light and extremely durable stuff? Can't remember what it's called for the life of me right meow but yeah. >_>