Part of its charm revolves around the rubberized tracks on its feet as well as on the extremities of each of its four limbs -- not surprisingly, these are engineered to help it maneuver in some pretty sticky situations.

ENGADGET: Carnegie Mellon's Chimp robot is reporting for duty, sir

The first US soldier to survive losing four limbs in Iraq has said he is looking forward to swimming and driving after having a double arm transplant.

BBC: Brendan Marrocco, US quadruple amputee, gets new arms

Dr. George Velmahos, the hospital's chief trauma surgeon, said Tuesday morning that four patients there have undergone amputations and two more limbs are in jeopardy.

WSJ: Doctors Treating Boston Marathon Victims Describe Injuries