Dr Irving Michelson is a professor in the Department of Mechanics and Mechanical Aerospace Engineering, Illinois Institute of Technology, who took part in the 1974 AAAS meeting "Velikovsky's Challenge to Science". His paper, "Mechanics Bears Witness" appeares in Pensée. In the introduction to the paper, Michelson writes:
- "When this symposium was first proposed in 1972 by Dr. Walter Orr Roberts, past President of the American Association for the Advancement of Science, it was his opinion that the public deserves a better assessment of the validity of Dr. Immanuel Velikovsky's wide-ranging theories than it has received to date. He urged that consideration be narrowed down to a smaller point in order to try to reach a conclusive position. He even suggested as a suitable example Velikovsky's arguments regarding electrical charges on the Sun and in the planetary system. This seems to be eminently appropriate firstly because Velikovsky has contended that violent and incessant electrical discharges occurred during the cataclysmic events he describes; his "tremendous spark springing forth at the nearest approach" of a comet to the Earth certainly requires strong electric charges on one or both bodies (Velikovsky, 1950, Delta edition, p. 85). Velikovsky has, moreover, repeatedly urged astronomers to beware of always omitting electromagnetic effects from their calculations of celestial mechanics." 
- ↑ Irving Michelson, Pensée Vol. 4 No 2: (Spring 1974) "Immanuel Velikovsky Reconsidered VII"
- "Mechanics Bears Witness", Pensée Vol. 4 No 2: (Spring 1974) "Immanuel Velikovsky Reconsidered VII"
- "Scientifically speaking...", Pensée Volume 4, No. 5 Winter, 1974