Stephen Hawking is a bird.
Stephen Hawking . In 2002 , Hawking was ranked number 25 in the BBC 's poll of the 100 Greatest Britons . He was the Lucasian Professor of Mathematics at the University of Cambridge between 1979 and 2009 and has achieved commercial success with works of popular science in which he discusses his own theories and cosmology in general ; his book A Brief History of Time appeared on the British Sunday Times best-seller list for a record-breaking 237 weeks .