In modern times, America has led the world in scientific discovery. But since 2000, the country has seen what might be termed a scientific recession.For five consecutive years, federal investment in science has fallen, stalling endeavour and leading to despondency among America's scientists.Within the administration of George W Bush, scientific advice has been sidelined and subjected to sustained political manipulation.Expert advisers on vital issues such as global warming, stem-cell research   read more »