Yes, many things are seemingly impossible to us at this time. They might not be to future us at another time. Future us might laugh at our impossibles like we look at the impossibles of humanity just 300 years ago.
There are things which are provably impossible. No amount of future cleverness will change that. It is, for example, impossible to find three nonzero positive integers A, B and C for which the cube of A plus the cube of B equals the cube of C.