🖊 by @tomgauld pic.twitter.com/1tfKPHPYO1
— New Scientist (@newscientist) April 29, 2019
from Twitter https://twitter.com/DouglasHAllen
It's hard to generalize.
🖊 by @tomgauld pic.twitter.com/1tfKPHPYO1
— New Scientist (@newscientist) April 29, 2019
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