Thousands of scientists protested in Washington, DC, and over 600 other cities on six continents on Saturday, 22 April 2017, to voice support for science, with calls for evidence-based public policy and increased funding for scientific research.Thousands of scientists protested in Washington, DC, and over 600 other cities on six continents on Saturday, 22 April 2017, to voice support for science, with calls for evidence-based public policy and increased funding for scientific research.