Topic: Stephen Furber
Five forms of new technology that can change the world: From the computer that beats humans on "Jeopardy!" to cellphone apps for African pick-and-hoe farmers, to satellites that spy on human rights abusers.
When small is big: Tinier chips demand less energy and could produce a cellphone that needs a battery charge only once a month.
Swiss scientist Michael Graetzel won the 2010 Millennium Technology Prize for his work on inexpensive solar cells for renewable energy projects.