Mammoth fragments from Siberia raise cloning hopes

Studies: Wind potentially could power the world

Studies: Alzheimer drug may stabilize brain plaque

7 scientists win prestigious Lasker medical awards

Balzan winners include NYU law professor

India launches satellites in 100th space mission

Visible from space: Curiosity tire tracks on Mars

Spacewalking team conquers bolt, installs box

New DNA encyclopedia shows complex inner workings

NASA Dawn spacecraft traveling to dwarf planet