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.
A Massachusetts Institute of Technology student tweezes a silicon wafer that, under high heat, will grow carbon nanotubes, some of the smallest conductors yet invented.
Watson on Jeopardy: After a shaky start, the IBM computer won against two of Jeopardy's best contestants. Having Watson on Jeopardy may have been an interesting challenge for IBM, but what will come of it?
Last night on Jeopardy, Watson did really, really well. But the machine also made some silly mistakes. Here's why.
IBM's Watson may school two of Jeopardy!'s top players, but does it represent a true advance in artificial intelligence?
The IBM computer Watson, appearing on Jeopardy! this week, may defeat the human players. But humanity is the real winner by gaining a better understanding of what real intelligence is.
PBS specials on scientific wonders, a PlayStation game that projects monsters, a book on Madame Curie, and more recommendations.