NASA @NASA
Over 6 years, a chemistry lab inside the belly of @MarsCuriosity has inhaled Martian air & analyzed its composition. Scientists found that the nitrogen & argon follow a predictable seasonal pattern — but not oxygen. Learn about the newest Martian mystery: https://t.co/Pf3kdsgC8E https://t.co/yy43UdeuSY — PolitiTweet.org