HealthAir pollution exposure may make our bones become weaker A study of 3700 people suggests that exposure to air pollution is linked to lower bone mineral content. This may make people more likely to develop osteoporosis News
VideoChasing the sun: How light and dark shape our bodies and mindsHuman biology is tuned to a 24-hour light-dark cycle but modern lifestyles are disrupting it with unhealthy consequences, says Linda GeddesVideo