Thousands of people are expected to attend March for Science events to promote the understanding of science and defend it from various attacks, including U.S. government budget cuts.
A man stands by a sign that reads “Science and Revolution” at the March for Science event near the Washington Monument in Washington, Saturday, April 22, 2017. Scientists, students and research advocates rallied from the Brandenburg Gate to the Washington Monument on Earth Day, conveying a global message of scientific freedom without political interference and spending necessary to make future breakthroughs possible.
(AP Photo/Sait Serkan Gurbuz)
AP Photo/Sait Serkan Gurbuz
Ellen Taylor from Albany, N.Y., poses with an Albert Einstein mask for a portrait at the March for Science event in Washington, Saturday, April 22, 2017. Scientists, students and research advocates rallied from the Brandenburg Gate to the Washington Monument on Earth Day, conveying a global message of scientific freedom without political interference and spending necessary to make future breakthroughs possible.
(AP Photo/Sait Serkan Gurbuz)
AP Photo/Sait Serkan Gurbuz
People arrive at the March for Science event near the Washington Monument in Washington, 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.
(AP Photo/Sait Serkan Gurbuz)
AP Photo/Sait Serkan Gurbuz
Erin Greeson with the Planetary Society, center, and Bill Nye “The Science Guy” right, talk backstage at the March for Science event near the Washington Monument in Washington, 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.
(AP Photo/Sait Serkan Gurbuz)
AP Photo/Sait Serkan Gurbuz
Mondrian Shumate, right, from Belfast, Maine, attends the March for Science event near the Washington Monument in Washington, 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.
(AP Photo/Sait Serkan Gurbuz)
AP Photo/Sait Serkan Gurbuz
A crowd gathers for the March for Science in Washington, 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.
(AP Photo/Sait Serkan Gurbuz)
AP Photo/Sait Serkan Gurbuz
Erin Greeson with the Planetary Society and Bill Nye “The Science Guy” talk backstage at the March for Science event in Washington, 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.
(AP Photo/Sait Serkan Gurbuz)
AP Photo/Sait Serkan Gurbuz
Conall Spaur from Howell, N.J., holds a sign while waiting in line for a teach-in on climate change at the March for Science event in Washington, 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.
(AP Photo/Sait Serkan Gurbuz)
AP Photo/Sait Serkan Gurbuz
A person hold up a sign that reads “Fund Climate Change Research Saving The Planet Is Not A Waste Of Money” during the March for Science in Washington, 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.
(AP Photo/Sait Serkan Gurbuz)
AP Photo/Sait Serkan Gurbuz
Retired U.S. Army Corporal Amy Schienschang from Williamsburg, Va., poses for a portrait with a sign that reads “A Woman’s Place Is In The Lab” at the March for Science event in Washington, Saturday, April 22, 2017. Scientists, students and research advocates rallied from the Brandenburg Gate to the Washington Monument on Earth Day, conveying a global message of scientific freedom without political interference and spending necessary to make future breakthroughs possible.
(AP Photo/Sait Serkan Gurbuz)
AP Photo/Sait Serkan Gurbuz
Laura Allen poses for a portrait with her children Shabbir and Nadiya at the March for Science event in Washington, Saturday, April 22, 2017. Scientists, students and research advocates rallied from the Brandenburg Gate to the Washington Monument on Earth Day, conveying a global message of scientific freedom without political interference and spending necessary to make future breakthroughs possible.
(AP Photo/Sait Serkan Gurbuz)
AP Photo/Sait Serkan Gurbuz
Ben Prickril poses for a portrait with a sign that reads “Vaccines Save Lives By The Millions” at the March for Science event in Washington, Saturday, April 22, 2017. Scientists, students and research advocates rallied from the Brandenburg Gate to the Washington Monument on Earth Day, conveying a global message of scientific freedom without political interference and spending necessary to make future breakthroughs possible.
(AP Photo/Sait Serkan Gurbuz)
AP Photo/Sait Serkan Gurbuz
March for Science protesters hold signs at the National Mall.
(WTOP/Kathy Stewart)
WTOP/Kathy Stewart
March for Science protesters hold signs at the National Mall.
(WTOP/Kathy Stewart)
WTOP/Kathy Stewart
A March for Science button sits in the rain.
(WTOP/Kathy Stewart)
WTOP/Kathy Stewart
Earth Day in D.C. was expected to draw crowds of over 100,000
(WTOP/Kathy Stewart)
WTOP/Kathy Stewart
Earth Day on Nat’ll Mall this year includes “March for Science.” Here are scientists from the University of Penn sporting their lab coats.
(WTOP/Kathy Stewart)
WTOP/Kathy Stewart
(WTOP/Kathy Stewart)
(WTOP/Kathy Stewart)
(WTOP/Kathy Stewart)
(WTOP/Kathy Stewart)
(WTOP/Kathy Stewart)
(WTOP/Kathy Stewart)