{"type":"rich","version":"1.0","provider_name":"Transistor","provider_url":"https://transistor.fm","author_name":"The Field Guide to Particle Physics","title":"Cosmic Rays : Part 4 : Paleoclimatology and Muons","html":"<iframe width=\"100%\" height=\"180\" frameborder=\"no\" scrolling=\"no\" seamless src=\"https://share.transistor.fm/e/f9cb10ea\"></iframe>","width":"100%","height":180,"duration":1007,"description":"When ice forms it traps air molecules with it. Ancient ice, trapped deep in glaciers near the Earth's poles can give us a record of what the atmosphere was like thousands - if not millions - of years ago. But only if we can calibrate the relationship between time and depth. Unlike sunlight, muons from cosmic rays can penetrate deep into this glacial ice, complicating this just a little bit.","thumbnail_url":"https://img.transistorcdn.com/ms0DEdWGHxRFV-iwboilxOVVMywvTeQXj3rWZPK1by4/rs:fill:0:0:1/w:400/h:400/q:60/mb:500000/aHR0cHM6Ly9pbWct/dXBsb2FkLXByb2R1/Y3Rpb24udHJhbnNp/c3Rvci5mbS9zaG93/LzE3MzEwLzE2MDk3/ODE1MDAtYXJ0d29y/ay5qcGc.webp","thumbnail_width":300,"thumbnail_height":300}