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Cars need it, trains need it, and guess what? People need it, too! Can you deduce the answer to my devious riddle? That's right, it's fuel! Fill up your tank, cause we're going on a trip to learn all about the things that keep other things going, from coal to tuna sandwiches and everything in between!SciShow Tangents is on YouTube! Go to to check out this episode with the added bonus of seeing our faces! Head to to find out how you can help support SciShow Tangents, and see all the cool perks you’ll get in return, like bonus episodes and a monthly newsletter!And go to to buy your very own, genuine SciShow Tangents sticker!A big thank you to Patreon subscribers Garth Riley, Tom Mosner, Daisy Whitfield, and Allison Owen for helping to make the show possible!Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! While you're at it, check out the Tangents crew on Twitter: Ceri: @ceriley Sam: @im_sam_schultz Hank: @hankgreen[Trivia Question]New York Times rocket fuel correction[Fact Off]Nuclear cars cell breathalyzers[Ask the Science Couch]Chlorophyll in photovoltaic cells/solar power[Butt One More Thing]Human waste converted into biomethane fuel 
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