We have certainly invented some wonderful things. We have, never before, found a way to defy physics. As beings of mass, we are bound by certain rules for our survival.
Aeroplanes are a great example of something that looks like it shouldn’t work, but it does, because we’ve learned to use physics to accomplish flight, not defy them.
I think the idea of defying gravity, teleportation of some sort, time travel…. it could all become possible if we are able to safely manipulate the physical world. We are fragile creatures, though. We don’t bounce safely and walk away when a plane fails and falls to the ground. We can’t live without taking a bit of our own atmosphere into space with us, and our bodies change under weightlessness. We are susceptible to all sorts of radiation.
The power and manipulation required for creating non-gravitational fields is beyond anything we are capable of creating and beyond what most of us can even imagine. Theories are there. We can’t even test those theories. The best we can work on at the moment is exploring the properties of mass, its make-up and how energy is expressed and released, like they are doing with the LHC and other colliders.
If you are interested in this stuff, support your local school’s science programs. Get those young minds interested in these subjects because they’ll be the one picking up the torch on these subjects.