Before the Time of Christ Benjamin Franklin Copernicus and His Famous Theory Franklin as a Scientist Galileo Galilei Galileo before the Dreaded Inquisition A Glimpse of Galileo's Private Life The Great Sir Isaac Newton Herschel Becomes a Professional Astronomer The Hon. Henry Cavendish Johann Kepler John Dalton More about Sir Isaac Newton The Rev. Dr. Joseph Priestley Roger Bacon Tycho Brahe University Professors of Two Thousand Years Ago Who Are the Heroes of Science? William and Caroline Herschel