John Leonard Riddell (February 20, 1807 – October 7, 1865) was a science lecturer, botanist, geologist, medical doctor, chemist, microscopist, numismatist, politician, and science fiction author in the United States. He was born in Leyden, Massachusetts, the son of John Riddell and Lephe Gates. He received his B.A. and M.A. at Rensselaer Polytechnic Institute from professor Amos Eaton and his M.D. from Cincinnati College in 1836.[1][2][3]