We've been flying with hot air balloons for over 200 years, and we've seen birds (heavier than air) fly. It's always been considered possible, we just didn't kn

We've been flying with hot air balloons for over 200 years, and we've seen birds (heavier than air) fly. It's always been considered possible, we just didn't know how to apply that to humans. We still haven't seen anything in nature that even hints to the possibility of faster than light