Harry Clement Stubbs (b. May 30, 1922 in Somerville, Massachusetts - d. October 29, 2003 in Milton, Massachusetts), better known by the pen name Hal Clement, was an American science fiction writer and a leader of the hard science fiction subgenre. Wikipedia
The definitive Wikipedia entry for Hal Clement. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Hal_Clement
About the Author Hal Clement, pen name of Henry Clement Stubbs, was born in 1922 in Somerville Massachusetts. www.rosettabooks.com/pages/author_72.html