NASA @NASA
We're working with @ESA to plan one of the most ambitious feats ever attempted in space—bringing a Mars sample to Earth. The Mars Sample Return campaign could help answer a question rovers alone cannot: Was there life on Mars? Here's how we plan to do it: https://t.co/vEqW0DJUlq https://t.co/Owoz2aHrKv — PolitiTweet.org