{"version":"1.0","type":"rich","provider_name":"Acast","provider_url":"https://acast.com","height":250,"width":700,"html":"<iframe src=\"https://embed.acast.com/$/69af43f6a944676525614d02/69af601bfa579a07b5bce283?\" frameBorder=\"0\" width=\"700\" height=\"250\"></iframe>","title":"Antarctic Ice Shelf Exploration - Part 4: The expedition navigates the challenges of the ice","description":"If the early years were about first contact and measurement, the middle decades became an experiment in scale and method. Field parties and aircraft broadened the reach of observation.\r\n\r\nRadar and aerial photography took over, where sledges and sextants once ruled. The ice margin that had been prodded with a plummet was now imaged from above, revealing ribbed lines and calving scars.\r\n\r\nLearn more at: https://theexplorationarchive.com/exploration/antarctic-ice-shelf-exploration","author_name":"The Archive Network"}