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Tim Urban @waitbutwhy
Exponential progress is when you go from thinking comets are omens to watching videos from their surfaces in a couple centuries. — PolitiTweet.org
Massimo @Rainmaker1973
One of the most stunning reports of our visit of a comet is probably this view of 67P/Churyumov–Gerasimenko among d… https://t.co/0pTgHsw9e5