Christiaan Huygens (born The Hague, Dutch Republic, 1629; died The Hague, Dutch Republic, July 8, 1695) was a mathematician, physicist, and astronomer. He discovered that Saturn had a ring around it and that Saturn had at least one moon, Titan. He wrote a book about probability theory, and he quantified several physics concepts.
Gary D. Schmidt (born Hicksville, New York, 1957) writes books for children. His Lizzie Bright and the Buckminster Boy earned both a Newbery Honor Award and a Printz Award in 2005. The Wednesday Wars received a 2008 Newbery Honor Award.
Anne Mansfield Sullivan (born Feeding Hills, Massachusetts, 1866; died Forest Hills, New York, October 20, 1936) was Helen Keller’s teacher from 1887 until her death in 1936. Older children can learn a great deal about Sullivan from the American Foundation for the Blind website: http://www.afb.org/asm/.