The Cosmic Dark Ages
Summary
This episode explores the cosmic dark ages, the era between the formation of the first atoms and the first stars. It details how scientists use 21-centimeter radio absorption and the Gunn-Peterson trough in quasar spectra to study this period. The discussion covers the formation of massive first-generation stars, the emergence of supermassive black holes, and the epoch of reionization. The episode concludes with a brief segment on quantum cryptography and post-quantum security protocols.
Topics discussed
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Introduction to the Cosmic Dark Ages
Recombination and the formation of atoms
First stars, galaxies, and reionization
How we know: evidence from absorbed light
The 21 cm signal and the end of the Dark Ages
Quasars and supermassive black holes
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Lyman alpha absorption and the Gunn-Peterson trough
Tracking reionization and future radio telescopes
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Listener Q&A: Quantum encryption and security
Sponsors: Uber Eats and SVB/1st Citizens
Sponsor: Anthropic
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