Quartz Weekly Obsession

Chalk

Colored chalk is seen on a street in Seeheim, Germany, April 7, 2017. REUTERS/Kai Pfaffenbach – RC1D8F71BBC0
Colored chalk is seen on a street in Seeheim, Germany, April 7, 2017. REUTERS/Kai Pfaffenbach – RC1D8F71BBC0
Image: Reuters/Kai Pfaffenbach
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