EntityQ16019342· pop 5· linked from 12 articlesJohn Call CookSign in to savegeophysicist, developer of ground-penetrating radar (1918-2012)ConnectionsphysicsEntityastronomyEntityAntarcticaEntityGreenlandConceptNASAConceptchlorineEntityelectronicsEntityInternational Standard Book NumberEntitygeneral relativityEntityWayback MachineEntityTulsaEntitydigital object identifierEntitygeophysicsEntitycosmic radiationEntityRobert H. GoddardEntitybinomial theoremEntityOCLC, Inc.Entityvacuum tubeEntityfire extinguisherEntityBoeing B-17 Flying FortressEntityCategories1918 births2012 deathsAmerican agnosticsAmerican cosmologistsAmerican experimental physicistsAmerican geophysicistsAmerican scientific instrument makersAmerican sustainability advocatesEberly College of Science alumniMassachusetts Institute of Technology facultyMIT Radiation Laboratory peoplePeople from Afton, Wyoming