Bill, it is obvious that Thoth has been reading the works of that eminent scientist Edgar Rice Burroughs. Burroughs wrote several volumes about the hollow earth, starting with "At the Earth's Core". In these volumes he outlined the lives of people living on the inner surface of the Earth, and the plant and animal life that they shared it with.

Bill Gill

C is not the speed of light in a vacuum.
C is the universal speed limit.