Juan R. Cruz Dr. Juan R. Cruz , Ph.D. , ( born : January 5 , 1946 ) is a Puerto Rican aerospace engineer who played an instrumental role in the design and development of the Mars Exploration Rover ( MER ) and Mars Science Laboratory ( MSL ) parachute .
Dr. Juan R. Cruz , Ph.D. ( born January 5 , 1946 ) is a Puerto Rican scientist who played a very important role in the design and development of the Mars Exploration Rover ( MER ) parachute .