Samples from the Curiosity rover suggest that Mars had a potentially habitable lake in its past, and gravitational lensing has helped scientists weigh a star!
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Sources:
http://science.sciencemag.org/content/356/6341/eaah6849.full
https://www.sciencedaily.com/releases/2017/06/170601151831.htm
http://science.sciencemag.org/content/early/2017/06/06/science.aal2879.full
https://www.eurekalert.org/pub_releases/2017-06/eau-nco060117.php
https://arstechnica.com/science/2017/06/einstein-still-annoyingly-right-as-researchers-weigh-white-dwarf/
https://arstechnica.com/science/2017/06/einstein-still-annoyingly-right-as-researchers-weigh-white-dwarf/
Images:
https://commons.wikimedia.org/wiki/File:Curiosity_Cradled_by_Gale_Crater.jpg
https://commons.wikimedia.org/wiki/File:PIA19080-MarsRoverCuriosity-AncientGaleLake-Simulated-20141208.jpg
https://commons.wikimedia.org/wiki/File:Triassic_Utah.JPG
https://commons.wikimedia.org/wiki/File:Fossils_in_a_beach_wall.JPG
https://commons.wikimedia.org/wiki/File:PIA16768-MarsCuriosityRover-AeolisMons-20120920.jpg
https://commons.wikimedia.org/wiki/File:PIA19912-MarsCuriosityRover-MountSharp-20151002.jpg
https://commons.wikimedia.org/wiki/File:Black_hole_lensing_web.gif
https://commons.wikimedia.org/wiki/File:JWST_Full_Mirror.jpg
https://commons.wikimedia.org/wiki/File:Gravitational.Microlensing.Light.Curve.OGLE-2005-BLG-006.png
https://commons.wikimedia.org/wiki/File:Einstein_revisited.jpg
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