On Tuesday famed climate scientist Kate Marvel joined the more than 10,000 people with PhDs in science, engineering and mathematics who, according to Science, are reported to have left the U.S. federal workforce since President Donald Trump took office in January.

“I thought I’d spend my entire career working at this wonderful place,” her letter stated. But she “never expected that science itself would come under attack, simply because it—like journalism, history, and even the best kind of art—is a way of seeking the truth. I’m leaving because I want to tell the truth.”