Archaeological geophysics, known to television viewers as ‘geofizz’, gives us a group of techniques which can be used to detect buried archaeological remains. Some of the more common ones include magnetometry, magnetic susceptibility mapping, resistivity and ground-penetrating radar (GPR). These are known as ‘remote-sensing’ or ‘prospection’ techniques. They help archaeologists locate buried structures and deposits and are very useful for helping to target excavation areas. From experimental beginnings in the 1950’s and 1960’s, geophysical techniques have grown into standard archaeological field practice in Britain and elsewhere, both on research and rescue projects.