In 2009, President Barack Obama presented Stephen Hawking with the Presidential Medal of Freedom. During his time as a professor at the University of Cambridge, Stephen Hawking worked in the Department of Applied Mathematics and Theoretical Physics. Jane Hawking, Stephen Hawking's first wife, has a PhD in medieval Spanish poetry from Cambridge. During their marriage, Stephen Hawking and Jane had three children together:Robert Hawking (1967)Lucy Hawking (1970)Timothy Hawking (1979)The couple divorced in 1995, and Stephen Hawking went on to marry his second wife, Elaine Mason, the same year. Books by Stephen Hawking.