Katrim Kumm and Destinee Trenberth, of Fortuna, added their signs to the march.

Randy Klein of Arcata threw in his support for science.

An art-heavy "We Love Science" sign at the march.

Part of the science expo prior to the Humboldt March for Science included a people's choice award for artwork created by grade school children. A favorite caption from kindergartener Annaka (lower right): "Grace the scientist likes to study cats and after studying them she feeds them fish. She is trying to teach them to speak English."

Missy Newkirk Fiedler, of Arcata, helped lead the face painting at the science expo at the D Street Neighborhood Center.

Kelly Garnett (in eagle mask) and Sandy Rosas (in wolf mask), of McKinleyville joined the crowd at the rally prior to the march.

After the rally, the Pandimonium band helped lead the march.

After the science expo and rally, participants in the Humboldt March for Science crossed the overpass on 11th Street in Arcata before looping around the Plaza.

The 11th Street overpass in Arcata was packed with signs and participants in the Humboldt March for Science on Saturday.

Quotes from Aldo Leopold to Dr. Seuss could be found on signs in the march.

Scott Osborn, of Manila, carried a two-sided sign with photos of Rachel Carson and John Muir in the Humboldt March for Science.

The crowd moving down the road.

One marcher carried a sign with a grim environmental warning.

Feeling the science love.

Some recent classic signs were revived.

A protest sign in the Humboldt March for Science.

After joining her grandmother Wendy Poppygeorge, of Hoopa, on stage at the rally, Gigi Alvarado (1 1/2 years old) walked in the Humboldt March for Science dressed in traditional clothing.