
NASA @NASA
Our @NASAPersevere rover will search for signs of ancient microbial life on Mars. But where are the best places to look? What instruments will it use, & how will @NASAAstrobio experts assess any evidence? Dive into the science as we #CountdownToMars: https://t.co/FRUYqNQW1E https://t.co/YfT4xALxTK — PolitiTweet.org