David Pratt May 2001 Part 2 of 4 Part 2: The Hollow Earth Hypothesis 1. Early theories 2. Modern theories 3. Hollow moons 4. Feasibility — I (06/04) 5. Feasibility — II (08/05) References 1. Early theories Since the scientific revolution, a small number of notable scientists have proposed the possibility of a hollow earth. One of the first was the famous English astronomer and mathematician, Sir Edmond Halley (1656-1742) [1]. He held that the earth had an outer […] Read More