Show Notes
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.
More from The Field Guide to Particle Physics
Antimatter is uncommon, but it’s not exactly rare. Antiparticles - especially those generated by cosmic radiation - are all around us, all the time. But just what is it doing here? As we discuss, the role of antimatter is fundamentally tied to our experience of reality.
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A realistic, pragmatic look at the Standard Model of Particle Physics, and what might remain to be seen.