One of the greatest treasures in science - Isaac Newtons Principia - was nearly thwarted by a book about fish. Royal Society head librarian Keith Moore and .


At the Royal Astronomical Society looking at another special piece of wood relating to Sir Isaac Newton More on 23andMe: .
Gary Rubinstein gives the background to Newton and The Principia published in 1687. He then introduces some background to Kepler and Galileo.