In 1957 56-days-old chickens weighed less than a kilogram. Their current counterparts weigh more than four times that https://t.co/jcrQwgXsVU pic.twitter.com/MFSlJfjrZu
— The Economist (@TheEconomist) August 7, 2019
via Twitter https://twitter.com/TheEconomist
August 07, 2019 at 02:13PM
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