The Trump administration's proposed 47% cut to NASA science would be the largest in the agency's history—slashing the budget to just $3.9 billion. This would terminate ongoing missions like Mars sample return, eliminate climate research, and waste billions already invested. Bill Nye and 300+ scientists are calling it an "extinction-level event" for NASA science. America's leadership in space exploration is at stake. Trump must reject these devastating cuts and fully fund NASA science.