These are the best protest signs from today's March for Science

The March for Science got underway in Washington, D.C., as well as across the nation and around the world Saturday. Thousands of protesters, in about 500 cities worldwide, were expected to turn out to celebrate science and protest President Donald Trump, a climate-change denier who recently reversed Obama-era environmental initiatives and installed an anti-Environmental Protection Agency crusader, Scott Pruitt, as head of the EPA — among other anti-science measures

Here are some of the best signs from the marches challenging Trump to embrace science.

"You can't comb over facts!" reads a sign during the March for Science.David Zalubowski/AP
"Act now or swim later," reads a sign at the March for Science in New York.BRYAN R. SMITH/Getty Images
In Washington, D.C., a demonstrator holds a sign urging America to "listen to science again."Sait Serkan Gurbuz/AP
A marcher in France holds a sign celebrating science's effectiveness over magic.FRANCOIS GUILLOT/Getty Images
In France, a protester holds up a sign reading, "I'm with her," referring to Mother Earth.FRANCOIS GUILLOT/Getty Images
"Science is true whether you believe it or not," reads a sign held by a protester in Washington, D.C.Mic/Will Drabold
A protester holds up a sign reading, "The oceans are rising and so are we!"Mic/Will Drabold

April 22, 2017, 2:00 p.m. Eastern: This story has been updated.