People hold up signs at a rally before the March for Science April 22, 2017 in New York.
Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People hold up signs at a rally before the march for Science April 22, 2017 in New York.
Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People hold up signs at a rally before the March for Science April 22, 2017 in New York.
Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
A woman holds up a sign at a rally before the March for Science on April 22, 2017 in New York.
Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
An activist with a message on her face looks on at a rally before the March for Science on April 22, 2017 in New York.
Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
An activist with a message on her face looks on at a rally before the March for Science on April 22, 2017 in New York.
Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs attend a rally before the march for Science April 22, 2017 in New York.
Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs attend a rally before the march for Science April 22, 2017 in New York.
Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence. /(Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs attend a rally before the march for Science April 22, 2017 in New York.
Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs attend a rally before the march for Science April 22, 2017 in New York.
Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People hold up signs at a rally before the march for Science April 22, 2017 in New York.
Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs walk in Times Square during the March for Science on April 22, 2017 in New York.
Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence. / AFP PHOTO / Bryan R. Smith (Photo credit should read BRYAN R. SMITH/AFP/Getty Images)
March For Science
People stand with signs in Times Square during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People stand with signs in Times Square at the end of the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs walk in Times Square during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs walk down Broadway during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs walk down Broadway during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs walk past the Trump International Hotel and Tower during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs walk past the Trump International Hotel and Tower during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs walk past the Trump International Hotel and Tower during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs walk past the Trump International Hotel and Tower during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs walk past the Trump International Hotel and Tower during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People carry puppets past the Trump International Hotel and Tower during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People line the sidewalk in Central Park listening to a rally before the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People carry a ship past the Trump International Hotel and Tower during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs walk in Times Square during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs walk in Times Square during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. (Credit: BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs walk in Times Square during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. / AFP PHOTO / Bryan R. Smith (Photo credit should read BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs walk in Times Square during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. / AFP PHOTO / Bryan R. Smith (Photo credit should read BRYAN R. SMITH/AFP/Getty Images)
March For Science
People with signs walk in Times Square during the March for Science on April 22, 2017 in New York.
Thousands of people joined a global March for Science on Saturday with Washington the epicenter of a movement to fight back against what many see as an "assault on facts" by populist politicians. / AFP PHOTO / Bryan R. Smith (Photo credit should read BRYAN R. SMITH/AFP/Getty Images)
March For Science
People hold up signs during the March for Science April 22, 2017 in New York.
Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence. / AFP PHOTO / Bryan R. Smith (Photo credit should read BRYAN R. SMITH/AFP/Getty Images)
