Wednesday, September 12, 2018

#geek - #A water hourglass


A water hourglass
https://imgur.com/t/science_and_tech/yIjA2OI

Submitted September 12, 2018 at 05:16PM by Parnasium
via reddit https://www.reddit.com/r/geek/comments/9fcryt/a_water_hourglass/?utm_source=ifttt

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