See the Startling Growth of Chickens From 1957 to 1978 to 2005

See the Startling Growth of Chickens From 1957 to 1978 to 2005  

See the Startling Growth of Chickens From 1957 to 1978 to 2005  

Slate in motion.
Nov. 3 2014 1:32 PM

Comparing Chickens From 1957, 1978, and 2005

They got much bigger.

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Researchers in Canada sought to raise three breeds of broiler chickens common in 1957, 1978, and 2005 without the influence of disparate feeds or hormones to see how they’d changed genetically.