🖊@tomgauld pic.twitter.com/bgMbY4dzic
— New Scientist (@newscientist) February 19, 2018
from Twitter https://twitter.com/DouglasHAllen
It's hard to generalize.
🖊@tomgauld pic.twitter.com/bgMbY4dzic
— New Scientist (@newscientist) February 19, 2018
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