Here's what I was thinking about today while looking out airplane windows: I was trying to figure out the economics of land and resources, then relate that to settling in space. Compare the two types of farm irrigation: circles and squares... pic.twitter.com/vbRj2HveBf
— Dr. Phil Metzger (@DrPhiltill) April 9, 2019
via Twitter https://twitter.com/DrPhiltill
April 09, 2019 at 10:18AM
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