Geology #10

May 29, 2009

This episode was recorded when Science for the People was called Skeptically Speaking.

Dr. Hans Machel discusses flood theory, crystals, the concept of a hollow earth, and why all these things can be explained using his Square of Irrational Thought. And on Speaking Up: celebrities and your health with Jill Powell.


  • Hans Machel
  • Jill Powell
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