Most women diagnosed with breast cancer when they're 40 or younger are choosing mastectomy rather than more limited and breast-conserving lumpectomy plus radiation, a study of women in Massachusetts finds.
Moreover, most of those choosing mastectomy elect to have the other, noncancerous breast removed, too.
There was great fanfare when the Mars Science Laboratory launched in November 2011, and again when its precious cargo — NASA's Mars rover Curiosity — touched down on the red planet in August 2012.
The eight months in between had drama of their own. Curiosity was constantly bombarded with radiation as it traveled through space — high-energy protons thrown out by the sun, and galactic cosmic rays slicing through the solar system from distant supernovas.