Dean Chapman displays tektites from Thailand

Portrait Dr. Dean Chapman in his office

Portrait Dr. Dean Chapman in his office

(L) Howard Larson (R) Dr Dean Chapman discuss tektite studies during news conference

(L) Howard Larson (R) Dr Dean Chapman discuss tektite studies during news conference

Vice President Lyndon Johnson (L) discusses tektites with Dr. Dean Chapman, Ames (R) during a tour of NASA Ames Research Center, Moffett Field, Calif.

CV-990 Galileo II arrival at Ames after first expedition - decending ramp are from top Don Anderson, Mike Bader, Dean Chapman (?), Hans Mark and unknown

Dr. Dean R. Chapman a Ames Research Center scientists studing tektits, holding a simulated tektite created in the Ames arc jet facility (left) and authentic Australian tektite over a map of Australia.