Science_books_in_Senate_HouseList of Free Science Books” from This site has hundreds of free books in chemistry, physics, astronomy, math, physiology, etc., all online. Click on a title and the online version pops right up. We’re intrigued by “The Wonder Book of Knowledge.” The table of contents lists topics like “Why do we Smile when we are pleased?” “How did the Dollar Sign originate?” “Why do some of us have freckles?”

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