Neil deGrasse Tyson @neiltyson
Congratulations to the United Arab Emirates on their arrival at Mars today. Their HOPE orbiter will perform a detailed study of the atmosphere, which long ago sustained running water on the Martian surface. Now it doesn’t. Lessons for us back on Earth, waiting to be learned. https://t.co/cRw6lzOq6A — PolitiTweet.org
