Sweeping layoffs, funding freezes and executive orders have provoked outcry among federal researchers and their university partners, who fear that science itself is under siege.
Fire debris and potentially toxic ash could make the water unsafe for surfers and swimmers, especially after rain that can transport chemicals, trash and other hazards into the sea.
Birds with modern-day features roamed the skies millions of years earlier than previously thought, according to a study published in the journal Nature.
The National Institutes of Health said it would limit indirect funding for research projects to 15%, dramatically slashing how much funding the federal government would provide to research agencies.
This week, 168 EPA staffers were put on administrative leave, with more layoffs expected. Several agency staffers described an atmosphere of fear and foreboding.