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In June 2017, I was waiting backstage at the Starmus Festival with Martin Rees as they labelled our identical macbook airs with different colours of tape. I turned to him and asked, (thread) economist.com/open-future/20…
"do you agree with what Hawking said [the previous day] that we may have to terraform Mars to escape climate change here on earth?"

"oh no," he replied. "Fixing climate change is a doddle in the park compared to terraforming Mars."
My undergrad degree + first 5 papers are in astrophysics so I was already a huge fan of Lord Rees' work; but after that i now love him even more because he is exactly right and he said it SO perfectly.
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