NASA @NASA
@SimonSkiles @NASAJPL @MarsCuriosity Something that we're on the lookout for with @NASAPersevere is something called a stromatolite--a fossilized mat of microbes. Stromatolites in Australia are evidence of ancient life on Earth, and if life existed on Mars, it might leave a record like this. https://t.co/B3c2TXIyar — PolitiTweet.org