Thousands of scientists and science lovers flocked to the U.S. capital, braving the cold rainy weather, to march in support of science and evidence-based research. Anti-Trump sentiments resonated in the protests across the U.S. as President Donald Trump has threatened of budget cuts to agencies funding scientists' work. 

Participants had gathered at Washington's National Mall to hear speakers give speeches appreciating the importance of science and railing against policymakers who seem oblivious to climate change theories, reports said. "Today we have a great many lawmakers -- not just here but around the world -- deliberately ignoring and actively suppressing science," one of the event's speakers, TV host and scientist Bill Nye, told the crowd.

ReadWhat Is The March For Science?

Similar marches took place in cities such as London, Sydney and Berlin, with more than 600 marches planned across the US, Europe, South America and Australia. Demonstrators in the U.S. had hand-painted placards and signs lambasting Trump's decisions such as possibility of withdrawing from the Paris Climate Treaty, his promise to to cut $900 million from the Department of Energy’s Office of Science or his executive orders deregulating coal waste dumping.

Placards with signs such as: "Not a paid protester. Believe men, I'd rather be in lab!" which was held by one bearded young scientist, "Science is NOT a liberal conspiracy," "This isn't about politics. It's about facts," were there. One protester, a computer scientist who are known for being geeks rather than braving the outdoors held a sign board: "You know it's bad when the PROGRAMMERS march!"

Here are some of the interesting signs that were seen across the U.S. at the march.

March for Science Protestors are seen at a rally at the Boston Commons during for the March for Science, April 22, 2017 in Boston, Massachusetts. Thousands of people joined a global March for Science Saturday with Washington the epicenter of a movement to fight back against what many see as an 'assault on facts' by populist politicians. Photo: Getty Images

March for Science A protester holds a anti-Trump sign during the March for Science in Los Angeles, California, April 22, 2017. Photo: Getty Images

March for Science People hold up signs during the March for Science in San Francisco, California, April 22, 2017. Photo: Getty Images

March for Science People hold signs during the March for Science in San Francisco, California, April 22, 2017. Photo: Getty Images

March for science Signs are held during the March for Science in San Francisco, California, April 22, 2017. Photo: Getty Images