Stand Up for Science is a 501(c)(4) non-profit organization founded in February 2025 by Colette Delawalla in response to policy changes in the second administration of Donald Trump that threaten scientific research.[1][3] The organization works to stop censorship and political interference in science, secure and expand research funding, and advocate for equal opportunities for all in science.[1][3] Among its goals is also the renewal of initiatives for diversity, inclusion and accessibility in science.[1] On March 7, 2025, it held a National Day of Action with several rallies, including the main one in Washington, D.C., at the Lincoln Memorial, where figures such as Francis Collins, Bill Nye, and Bill Nelson spoke; in total, over 170 events were held around the world with the participation of more than 50,000 people.[1][2][3] It issued the Bethesda Declaration, the June 30, 2025 EPA Letter of Dissent criticizing the EPA administration, and the NASA Voyager Declaration.[1] In 2026, he plans rallies at 33 locations in the US to defend scientific integrity and public health.[2] The organization has thousands of volunteers in almost every congressional district and collaborates with scientists from agencies such as NIH, EPA, and NASA.[2][3]