We have evolved over hundreds of millions of years on the surface of the planet Earth. Our evolution has taught us nothing about anywhere else. Our perceptions are ingrained in us through our experience on the planet surface. Most of us have never been anywhere else except here. The few who have been in orbit about the planet or in deeper space have been so close to the planet surface that their experience has been largely unchanged and innocuous in a relative way. Our surface-ingrained perceptions, our inherited and assimilated perceptions, the perceptions that were in fact created within our physiologies through evolution on the planet surface are very diffi cult to change in our minds.