Get 50% off your SciShow Space calendar today by heading to https://complexlycalendars.com/products/scishowspace Astronomers have found more than 5,000 planets in the last three decades, but that’s not nearly as exciting as potentially coming across the first extraterrestrial creatures. And we may finally be in a position to make that discovery. Hosted by: Hank Green (he/him) Thumbnail Courtesy: TMT Observatory Corporation ---------- Huge thanks go to the following Patreon supporter for helping us keep SciShow Space free for everyone forever: Jason A Saslow, David Brooks, and AndyGneiss! Support SciShow Space by becoming a patron on Patreon: https://www.patreon.com/SciShowSpace Or by checking out our awesome space pins and other products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? SciShow on TikTok: https://www.tiktok.com/@scishow SciShow Tangents Podcast: http://www.scishowtangents.org Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Instagram: http://instagram.com/thescishow ---------- Sources: https://exoplanets.nasa.gov/faq/6/how-many-exoplanets-are-there/ https://www.sciencefocus.com/space/how-far-from-earth-could-aliens-detect-our-radio-signals/ https://www.seti.org/primer-seti-seti-institute https://www.centauri-dreams.org/2020/07/03/a-seti-reality-check/ https://www.ncbi.nlm.nih.gov/books/NBK540092/ https://astrobiology.nasa.gov/about/ https://exoplanets.nasa.gov/resources/2312/spectroscopy-detection-of-biosignatures/ http://spiff.rit.edu/classes/resceu/lectures/spectra/spectra.html http://spiff.rit.edu/classes/resceu/lectures/spectra/ans_trans_frac.txt https://academic.oup.com/mnras/article/448/3/2546/1109920 https://astrobiology.nasa.gov/news/detecting-lifes-influence-on-planetary-atmospheres https://www.liebertpub.com/doi/10.1089/ast.2017.1727 https://bio.libretexts.org/Bookshelves/Microbiology/Book%3A_Microbiology_(Boundless)/8%3A_Microbial_Evolution_Phylogeny_and_Diversity/8.15%3A_Euryarchaeota/8.15C%3A_Methane-Producing_Archaea_-_Methanogens https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4323125/ https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/rog.20011 https://www.pnas.org/doi/10.1073/pnas.2117933119 https://arxiv.org/pdf/2208.07393.pdf https://iopscience.iop.org/article/10.3847/1538-4357/ac8cfb https://exoplanets.nasa.gov/trappist1/ https://iopscience.iop.org/article/10.3847/1538-4357/aa7fea https://www.newscientist.com/article/mg25233640-700-3-of-the-most-exciting-space-telescopes-planned-for-launch-by-2034/ https://asd.gsfc.nasa.gov/luvoir/design/ https://asd.gsfc.nasa.gov/luvoir/reports/LUVOIR_FinalReport_2019-08-26.pdf https://arxiv.org/abs/2105.09990 https://www.researchgate.net/publication/7801784_Vegetation s_Red_Edge_A_Possible_Spectroscopic_Biosignature_of_Extraterrestrial_Plants https://phys.org/news/2020-03-clouds-obscure-view-exoplanet-surfaces.html https://www.cfa.harvard.edu/facilities-technology/telescopes-instruments/giant-magellan-telescope https://arxiv.org/pdf/1705.05791.pdf https://www.nasa.gov/feature/goddard/2022/nasa-s-webb-detects-carbon-dioxide-in-exoplanet-atmosphere https://www.nasa.gov/image-feature/goddard/2022/nasa-s-webb-reveals-steamy-atmosphere-of-distant-planet-in-detail Images: https://commons.wikimedia.org/wiki/File:NASA-Exoplanet-WaterWorlds-20180817.jpg https://svs.gsfc.nasa.gov/13375 https://commons.wikimedia.org/wiki/File:Artist%E2%80%99s_impression_of_the_European_Extremely_Large_Telescope_(15761494008).jpg https://www.nasa.gov/image-feature/a-spin-around-an-exoplanet-most-like-earth https://exoplanets.nasa.gov/resources/2312/spectroscopy-detection-of-biosignatures/ https://www.nasa.gov/image-feature/goddard/2022/nasa-s-webb-reveals-steamy-atmosphere-of-distant-planet-in-detail https://commons.wikimedia.org/wiki/File:Exoplanet-WASP-39b-20180301.jpg https://www.eurekalert.org/news-releases/772739 https://commons.wikimedia.org/wiki/File:Sea_lettuce_in_Brofjorden_1_-_cropped.jpg https://www.flickr.com/photos/ex_magician/4235161003 https://commons.wikimedia.org/wiki/File:NASA-RedDwarfPlanet-ArtistConception-20130728.jpg https://svs.gsfc.nasa.gov/30870 https://www.esa.int/Science_Exploration/Space_Science/Plato_factsheet https://commons.wikimedia.org/wiki/File:Rendering_of_LUVOIR-A_observatory,_2019.png https://commons.wikimedia.org/wiki/File:Hubble_ultra_deep_field.jpg https://commons.wikimedia.org/wiki/File:Giant_Magellan_Telescope_-_artist%27s_concept.jpg https://commons.wikimedia.org/wiki/File:Top_view_of_tmt_complex.jpg