SciShow Tangents’ exploration of the electromagnetic spectrum continues with good old, dependable light! What is it? Where does it come from? Only Ceri knows (sort of)!

Also, happy New Year to all of our amazing listeners! Thank you for your support over the last year, and here's to another year of laughing and learning with all of you!

Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! 

If you want to learn more about any of our main topics, check out this episode's page at SciShowTangents.org!

[Truth or Fail]

E. coli

https://arxiv.org/abs/1104.3113

https://phys.org/news/2014-04-bacterial-fm-radio.html

Cactus Radio

https://www.youtube.com/watch?v=I1shcxHWQas

Frequency Comb

https://www.pnas.org/content/116/19/9181

https://www.laserfocusworld.com/lasers-sources/article/14035201/frequency-combs-trick-a-laser-into-producingreceiving-an-rf-signal

[Fact Off]

Battle of the Beams

https://www.bbc.co.uk/history/ww2peopleswar/stories/63/a3714563.shtml

https://www.nytimes.com/1997/12/19/us/r-v-jones-science-trickster-who-foiled-nazis-dies-at-86.html

http://vc.airvectors.net/ttwiz_07.html

RV Jones Obituary

W5LFL

https://amsat-uk.org/2013/01/19/amateur-radio-on-bbc-between-the-ears-space-ham/#more-12135

https://www.amsat.org/owen-k-garriott-w5lfl/

[Ask the Science Couch]

Analog radio

https://public.wsu.edu/~bryan.mclaughlin/Radio/Who_Invented_Radio.html

https://www.pbs.org/wgbh/aso/tryit/radio/radiorelayer.html

https://www.reddit.com/r/explainlikeimfive/comments/4suas5/eli5_why_is_the_sound_quality_of_am_radio_so_much/

Digital/HD radio

https://www.fcc.gov/consumers/guides/digital-radio

https://electronics.howstuffworks.com/hd-radio.htm

https://hdradio.com/trademark/

https://www.cnet.com/news/digital-radio-all-you-need-to-know/

[Butt One More Thing]

Pigeon poop / cosmic microwave background

https://www.smithsonianmag.com/smithsonian-institution/how-scientists-confirmed-big-bang-theory-owe-it-all-to-a-pigeon-trap-180949741/