Abstract

There are a number of geophysical and astrophysical problems with Burroughs' s setting. Perhaps it is pointless to complain, 75 years too late, about the "hardness" of such science fantasies, for the strong suit of Burroughs' writings always lay in their imaginative sweep, never their scientific accuracy. In the case of Pellucidar, however, Burroughs committed a blunder that sets the teeth of every physicist on edge: he assumed that gravity would pull toward the inner surface of a hollow sphere