Protesters march in support of science from downtown Chicago. The March for Science went from downtown to the Field Museum of Natural History. Approximately 40,000 people attended the national day of march in Chicago. April 22, 2017 (Photograph by Shannon Jahrling)

Protesters hold ban March for Science as they march from downtown Chicago. The March for Science gathered approximately 40,000 people in Chicago. April 22, 2017 (Photograph by Shannon Jahrling)

In the 47th anniversary of Earth Day demonstrators of the March for Science cross a bridge as they head to the Field Museum of Natural History. April 22, 2017 (Photograph by Shannon Jahrling)

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