Maybe There Isn't Liquid Water on Mars

Captions provided by CCTubes – Captioning the Internet! Two years ago we were very excited about the announcement of water on Mars, but some new research challenges that idea. And one of our most successful exoplanet finding tools has discovered another one, this time pretty close to home!

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Sources:
http://nature.com/articles/doi:10.1038/s41561-017-0012-5
https://www.space.com/36162-mars-dark-streaks-dry-avalanches.html
https://www.nasa.gov/mission_pages/phoenix/news/phoenix-20080731.html
http://www.nature.com/ngeo/journal/vaop/ncurrent/full/ngeo2917.html
https://www.nasa.gov/feature/jpl/mars-gullies-likely-not-formed-by-liquid-water
http://onlinelibrary.wiley.com/doi/10.1002/2016GL068956/full
https://www.nature.com/articles/ngeo2546

https://www.aanda.org/component/article?access=doi&doi=10.1051/0004-6361/201731973
https://www.eso.org/public/archives/releases/sciencepapers/eso1736/eso1736a.pdf
https://www.eurekalert.org/pub_releases/2017-11/e-ctw111317.php
https://www.eso.org/public/teles-instr/lasilla/36/harps/

Images:
https://www.nasa.gov/press-release/nasa-confirms-evidence-that-liquid-water-flows-on-today-s-mars
https://commons.wikimedia.org/wiki/File:South_Polar_Cap_of_Mars_during_Martian_South_summer_2000.jpg
https://commons.wikimedia.org/wiki/File:Warm_Season_Flows_on_Slope_in_Newton_Crater_(animated).gif
https://commons.wikimedia.org/wiki/File:Hirise_at_mars.jpg
https://commons.wikimedia.org/wiki/File:Slope_Lineae_PIA14479-43_946-710.jpg
https://www.nasa.gov/feature/jpl/mars-gullies-likely-not-formed-by-liquid-water
http://www.eso.org/public/usa/images/eso1736a/
https://commons.wikimedia.org/wiki/File:Spektrograf_HARPS.jpg
https://commons.wikimedia.org/wiki/File:RedDwarfNASA.jpg
https://commons.wikimedia.org/wiki/File:ELT_concept.jpg