The Nobel Prize for chemistry was awarded to 2 scientists working on nanotechnology — the creation of structures on the scale of a nanometer, or a billionth of a meter. The machines conceived by the laureates are one-thousandth the width of a strand of human hair. Crazy right?! Think about tiny robots that the doctor in the future will inject in your blood veins, use to search for cancer cells or deliver drugs. Learn more at BBC (4 minutes).