HealthThe body’s killer immune cells also feed fetuses in the womb Natural killer cells – which destroy cancer cells and pathogens – also help early fetuses grow, a finding that may lead to treatments to prevent miscarriage 51¶¯Âþ
PhysicsGood news: one form of air pollution may be falling in Europe Levels of nitrogen dioxide in European city air rose throughout the 2000s but seem to have reached a peak in 2010 – suggesting Europe might get cleaner air sooner than expected 51¶¯Âþ