
CSPAN @cspan
.@bethanyehlmann on @NASAPersevere and Mars exploration: "Everywhere you see a colored dot on this image it's a mineral that formed in the presence of water...there are thousands of places to explore, but we've gotten to a handful of them so far." https://t.co/d0dnaACmNo https://t.co/zSjyyYowBk — PolitiTweet.org