Thousands march to support science

A person dressed as a polar bear drags some ice at the L.A. March for Science.

People participate in the L.A. March for Science. Marchers in Los Angeles include scientists, educators, students, advocates, and community leaders.

Kathy Griffin is hot at the L.A. March for Science.  (Genaro Molina / Los Angeles Times)

Mike Gloria, 58, holding a deer’s head, enjoys a conversation in front of City Hall at the end of the March for Science.

People participate in the L.A. March for Science. Marchers in Los Angeles include scientists, educators, students, advocates, and community leaders.

People participate in the L.A. March for Science. Marchers in Los Angeles include scientists, educators, students, advocates, and community leaders.

People participate in the L.A. March for Science. Marchers in Los Angeles include scientists, educators, students, advocates, and community leaders.

People participate in the L.A. March for Science. Marchers in Los Angeles include scientists, educators, students, advocates, and community leaders.

Sandy Zaic presents an elemental suggestion during the L.A. March for Science.  (Genaro Molina / Los Angeles Times)

Art Li, right, and Mario Rojas make their statement known at the L.A. March for Science.  (Genaro Molina / Los Angeles Times)

People march along Hill Street for the L.A. March for Science.   (Genaro Molina / Los Angeles Times)

People march downtown for the L.A. March for Science.   (Genaro Molina / Los Angeles Times)

People gather at Pershing Square to participate in the L.A. March for Science.  (Genaro Molina / Los Angeles Times)

Ross Gardner has words of warning as people gather at Pershing Square to participate in the L.A. March for Science.  (Genaro Molina / Los Angeles Times)

Crowds gather at Pershing Square for the L.A. March for Science.

March for Science participants carry signs at Pershing Square.

The March for Science in London passes Big Ben and Parliament.

A dog joins his master at the March for Science in London.

Dutch science fans carry signs in the March for Science in Amsterdam.

New York March for Science participants rally on Central Park West.

An activist wears tape with a message over her mouth at a rally before the March for Science in New York.

Signs make fun of President Trump at the March for Science in New York.

A large crowd attended the March for Science in Berlin.

A woman wears a “brain� hat to the March for Science in Athens, Ga.

An Austrian woman carries a sign in the March for Science in Vienna.

March for Science participants fill Theater Square in Dresden, Germany.

Science fans gather on the National Mall for the March for Science in Washington, D.C.