|March for Science, Constitution Avenue, Washington, D.C.|
|Art, wearing his UCLA Neuroscience t-shirt, and Caroline with her sign|
|A sea of signs|
Here are a few of the many marchers and signs.
|Dinosaur carrying sign: "The comet was a Chinese hoax."|
|We saw knitted brain hats in pink and gray|
|Signs: Earth to Trump and Science Brings Us Together|
|Three great men march for science|