Night vs. day shift: How does it affect nurses?

In the hospital, your life may be in the hands of your nurse. A nurse who could have already worked nine, ten or more hours by the time they see you. Do those long 12 hour shifts affect the care you get?

NYT: Study says e-cigs are safer than the real deal

In the last several years, e-cigarettes have exploded onto the smoking scene, marketed as a safer alternative, and a method to kick the smoking habit. A new study says, for those purposes, they work, but it falls short of deeming them safe overall. And for one major reason: teenagers.