This morning, the sky was overcast and it was pleasantly warm. Lots of babies develop hyperbilirubinaemia (jaundice) after birth here, more than in UK. This might be because of more glucose 6 phosphate dehydrogenase deficiency and haemoglobinopathies. Phototherapy and natural sunlight both help to break down bilirubin. This was first noticed in a hospital in Essex when a nurse noticed that babies exposed to sunlight cleared their jaundice faster, in the 1950s. Blue (not UV) light works best. Here granny (notice the dressing on the side of her head, remember her?) and a father exposure their new babies to some natural rays.