Around the World, Cities Swell With Celebrations for Science

People carry a March for Science banner and signs as they pass the U.S. Environmental Protection Agency during the March For Science in Washington, DC, April 22, 2017.

Organizers of the march sought to call attention to climate change and President Trump's budget cuts to organizations that aid scientific research.The DC march was one of dozens around the United States. Hundreds of thousands of people in more than 400 locations across the globe also took part in the March for Science to recognize scientific progress, raise awareness of scientific discovery, and defend scientific integrity.

Science educator Bill Nye, popularly known as 'Bill Nye the Science Guy', announces the start of the March for Science, which saw tens of thousand of protesters walking along Constitution Avenue, in Washington, DC.

Scientists, students and research advocates rally from the Brandenburg Gate to the Washington Monument in Washington, DC, conveying a global message of scientific freedom without political interference and spending necessary to make future breakthroughs possible.

Protesters participate in the March for Science rally in Santiago, Chile.

People stand with signs in Times Square at the end of the March for Science in New York.

A man in a Donald Trump mask pretends to play golf with the earth during the science march in New York City.

Activists carry a portrait of Benjamin Franklin-- an American Founding Father and renowned scientist-- during a march in Washington, DC.

Members of a group called W.I.T.C.H-- which stands for various different phrases-- join the March for Science rally on the Common in Boston.

A brass band walks with demonstrators marching down Commonwealth Avenue from Massachusetts Institute of Technology (MIT) to the March for Science rally on the Common in Boston.

Children hold a banner during the science march in Mexico City, Mexico. The banner reads "Science for Life, Never for War."

Demonstrators use Christmas to illustrate the importance of science in Los Angeles, California.

A demonstrator holds a placard as he participates in the March for Science rally in Mexico City, Mexico. The placard reads "Give holiday to your sin."

Scientists and supporters dress is costume for the Los Angeles march.

Demonstrators gather at the Boston Common.

A man gestures with 'Galileo's light' in Washington, DC.

Demonstrators hold signs of significant women in science during the March for Science in Washington, DC.

Scientists and supporters participate in the march under a rainy sky in Washington, DC.

Protesters are seen at a rally at the Boston Commons.

Scientists and supporters gather in Pershing Square in Los Angeles.

Harry Park pours boiling water into a bucket of liquid nitrogen, making a "thunder cloud" for a science experiment demonstration by the Berkshire Museum at the Pittsfield March for Science in Pittsfield, Massachusetts.

Protesters hold banners during the March for Science in Paris, France, where scientists, science enthusiasts, and concerned citizens come together to make themselves heard.

Demonstrators attend the March for Science in front of the Pantheon in Rome, Italy, 22 April 2017.

A man and child join the march in San Francisco.

Demonstrators at the San Francisco science march. March for Science in San Francisco.