San Francisco, California, USA. 22nd April, 2017. A man dressed as a giant robot towers above the crowd spilling out from a rally held at Justin Herman Plaza before San Francisco's March for Science began April 22, 2017. The man-robot wears a sign reading "Knowledge = Power." Thousands of people filled downtown San Francisco to show for support for science in the while also protesting Trump's major cuts to the Environmental Protection Agency, the National Institutes of Health and other science-related organizations and programs. Credit: Shelly Rivoli/Alamy Live News

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Keywords: 22, 2017, april, day, earth, francisco, march, protest, rivoli, san, science, shelly, trump