People protest holding banners at the March for Science event in Madrid, Saturday, April 22, 2017. Thousands of scientists worldwide left their labs to take to the streets Saturday along with students and research advocates in pushing back against what they say are mounting attacks on science.
People protest holding banners at the March for Science event in Madrid, Saturday, April 22, 2017. Thousands of scientists worldwide left their labs to take to the streets Saturday along with students and research advocates in pushing back against what they say are mounting attacks on science. Daniel Ochoa de Olza AP
People protest holding banners at the March for Science event in Madrid, Saturday, April 22, 2017. Thousands of scientists worldwide left their labs to take to the streets Saturday along with students and research advocates in pushing back against what they say are mounting attacks on science. Daniel Ochoa de Olza AP

Historians say the March for Science is 'pretty unprecedented'

April 22, 2017 10:40 AM