In cities all over the world Saturday, scientists and fans of fact and reason have come out in droves to support science.
But what, exactly, are they marching for?
We went to the New York City March for Science to ask people exactly what brought them into the streets to march in support of science.
Graduate student Laura Menocal, who studies immunology, said she was marching because she's seen the value of research into deadly diseases.
"I've worked closely with pediatric oncologists and I've seen the pain that families go through when they lose loved ones, but research and science gives them hope that one day nobody will have to endure this pain anymore," Menocal said. Read more...