DR. DAN Q. POSIN, assisted by his cat Minerva, delights TV audiences with his witty, yet wonderfully simple explanations of difficult scientific subjects. He now brings these same appealing traits to this book for children.
Dr. Posin, who came to the U. S. from Russia at the age of nine, is a professor of physics at Chicago's De Paul University. He has taught at the Universities of California, Panama, and Montana, and is scientific consultant for the Columbia Broadcasting System. He is the author of many scientific books.
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