NurPhoto via Getty Images

A young girl poses with a placard reading 'Go! for science' during a march for Science. It took place in Toulouse, France, on 22 April 2017, for Earth's Day. As Trump promotes alternative facts and deny climate change as some other leaders; scientists, citizens call for a march for science and for verified facts. Similar marches took place elsewhere in France as in Europe as in other places in the world. These marches took place on Earth's Day. (Photo by Alain Pitton/NurPhoto via Getty Images)