New Scientist: We know ozone is bad for our lungs the increased risk of developing diseases such as asthma was one of the reasons people wore face masks during January's record-breaking smog in China. But exactly what it did to the lungs has never been clear. To investigate, Katherine Thompson from Birkbeck College in London and colleagues scattered neutrons off an oily surface. It was designed to mimic the fluid films on lung tissues which make the exchange of oxygen and carbon dioxide more efficient. By looking...