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Here is a man with an imagination so large that just ?by thinking on it, ? he invented calculus and figured out the scientific explanation of gravity. Kathleen Krull presents a …
The electrifying biography of innovative scientist Benjamin Franklin is the perfect addition to this outstanding series Benjamin Franklin is a famous colonial inventor and …
Leonardo da Vinci's notebooks are mind-boggling evidence of a fifteenth-century scientific genius standing at the edge of the modern world, basing his ideas on observation and …