In annual physicals teens and docs failed to talk sex a third of the time and usually too briefly when the subject was addressed. Dina Fine Maron reports

David Biello looks back at the big environmental stories of the year covered on 60-Second Earth

Middle-aged to elderly adults with no history of exercising still saw significant health benefits from even small additions of regular physical activity to their schedules. Dina Fine Maron reports

E-waste is a large--and growing--problem that can be addressed by thoughtful disposal, David Biello reports

A population model suggests that a small dietary change, such as eating a daily piece of fruit instead of the equivalent calories in less healthful fare, may stave off as many heart-related deaths as would statins. Christopher Intagliata reports

The annual Christmas Bird Count is revealing big changes in the avian world, thanks to us ground-dwellers. David Biello reports

New research suggests a link between the precipitous meltdown of Arctic summer sea ice and broiling heat waves. David Biello reports

Toxicity testing on shampoo that fights flakes reveals that it's bad for plants and animals once it's in wastewater. David Biello reports

A new study examines the links between environmental degradation and human illness. David Biello reports

Swaddling infants is safe when done correctly. But done wrong, it raises the risk of osteoarthritis and the need for hip replacement in middle age. Dina Fine Maron reports