1/ I just stumbled on these pics I took 3 years ago at a public pool showing the waterfall feature. There's some awesome science in this. pic.twitter.com/0XegzDbWT5
— Dr. Phil Metzger (@DrPhiltill) February 19, 2019
via Twitter https://twitter.com/DrPhiltill
February 19, 2019 at 09:30AM
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