What profession does Jack Green and Gerard Kuiper have in common?
Jack Green (geologist): Jack Green (18 June 1925 – 5 September 2014) was a geologist and geology professor at California State University Long Beach. Gerard Kuiper: Gerard Peter Kuiper ( ; ] ; born Gerrit Pieter Kuiper; December 7, 1905 – December 23, 1973) was a Dutch–American astronomer, planetary scientist, selenographer, author and professor.
professor