The head of the US National Science Foundation, a $9 billion agency charged with advancing discoveries across the scientific spectrum, resigned Thursday amid sweeping changes spearheaded by the current Trump administration. NSF Director Sethuraman Panchanathan has led the agency since he was selected by President Donald Trump during his first term and unanimously confirmed by the Senate in June 2020. “I believe I have done all I can to advance the critical mission of the agency and feel that it is time for me to pass the baton to new leadership,” Panchanathan said in parting remarks, which were provided to...