Archived 2012-06-22 at the Wayback Machine, What's New, APS, 3 May 2002 1 2 "Free Energy: APS Board Speaks Out on Perpetual Motion" Archived 2012-06-22 at the Wayback Machine, What's New, APS, 28 June 2002 "The Executive Board of the American Physical Society is concerned that in this period of unprecedented scientific advance, misguided or fraudulent claims of perpetual motion machines and other sources of unlimited free energy are proliferating. Such devices would directly violate the most fundamental laws of Nature, laws that have guided the scientific advances that are transforming our world." ↑ Energy: No Such Thing as a Free Lunch", Eric Prebys, Guest Lecture at Columbia University, November 4, 2008. Also, shorter version for Fermilab's "Ask a scientist" program, December 6, 2009 ↑ Trovon De Carvalho, A. L.; Rodrigues, W. A.