Dafydd Williams, Canadian physician and astronaut

Dafydd Williams

Canadian astronaut, physician and public speaker (born 1954)

Dafydd "David" Rhys Williams is a Canadian physician, public speaker, author and retired CSA astronaut. Williams was a mission specialist on two Space Shuttle missions. His first spaceflight, STS-90 in 1998, was a 16-day mission aboard Space Shuttle Columbia dedicated to…