To our very limited understanding of physics.
For someone that has been doing it for a long time? They laugh at us.
As Michio Kaku said, our few thousand years of development of knowledge would allow us to disdain the efforts of primitives to cool food in stream water and add more wood or coal to a larger stove while we could invent microwave ovens and advanced forms of kitchen freezers, refrigerators and ranges. What would a civilization that started its progress 100,000 or a million years ago say to us about antigravity and other topics?