The Cosmic Microwave Background shows us the oldest light in the universe, but to really understand the early universe we need something even older: The Cosmic Neutrino Background.
Host: Reid Reimers
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Sources:
http://iopscience.iop.org/article/10.1088/1742-6596/580/1/012040/pdf
https://www.forbes.com/sites/startswithabang/2016/09/09/cosmic-neutrinos-detected-confirming-the-big-bangs-last-great-prediction/#1677c0ee30c7
https://arstechnica.com/science/2015/09/signs-of-neutrinos-from-the-dawn-of-time-less-than-a-second-after-the-big-bang/
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.95.011305
http://www.ras.org.uk/news-and-press/89-news2005/794-ripples-in-cosmic-neutrino-background-measured-for-the-first-time
https://authors.library.caltech.edu/58929/1/1.4915587.pdf
https://www.energy.gov/sites/prod/files/2015/07/f24/The%20Princeton%20Tritium%20Observatory%20for%20Light%2C%20Early%20Universe%2C%20Massive%20Neutrino%20Yield%20%28PTOLEMY%29.pdf
http://inspirehep.net/record/1607470/files/PoS(NOW2016)092.pdf
https://www.princeton.edu/news/2016/03/14/hunt-big-bang-neutrinos-may-provide-fresh-insight-origin-universe
http://s3.amazonaws.com/sf-web-assets-prod/wp-content/migration/sf/report2015/stories/ptolemy.html
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Images:
https://commons.wikimedia.org/wiki/File:Ilc_9yr_moll4096.png
https://apod.nasa.gov/apod/ap130325.html
https://images.nasa.gov/details-GSFC_20171208_Archive_e000125.html
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