Staffers at the US National Science Foundation, one of the biggest funders of basic research in the world, have been told to stop all “funding actions”.Credit: Tada Images/ShutterstockStaff members at the US National Science Foundation (NSF) were told on 30 April to “stop awarding all funding actions until further notice,” according to an email seen by Nature.The policy prevents the NSF, one of the world’s biggest supporters of basic research, from awarding new research grants and from supplying...