Computer chips will cost about a penny. That's the cost of scrap paper. The Internet will be basically for free and it will be inside our contact lens. When we blink, we will go online. When we see somebody that we don't recognize, our contact lens will identify who they are, print out their biography in your contact lens and translate, if they're speaking Chinese, into English with subtitles as they speak.

The reactors in Japan are stable in the same way that a ticking time bomb is also stable. It wouldn't take much to light the fuse - a 6.6 earthquake, like what happened today in Japan, a pipe break, an over-pressurized containment vessel - anything could set it off, in which case we would have another Chernobyl, three times the magnitude of a Chernobyl accident.

Cesium, iodine from the Chernobyl reactor accident went around the world many times and everyone on the Earth has a piece of Chernobyl in their bodies, but it's very tiny - too small to cause much damage.

To a physicist, we have the 'I' word, the I-word is 'impossible.' That's dangerous.

God throws dice, what can I say?

If you want to see a black hole tonight, tonight just look in the direction of Sagittarius, the constellation. That's the center of the Milky Way Galaxy and there's a raging black hole at the very center of that constellation that holds the galaxy together.

For most of human history, we could only watch, like bystanders, the beautiful dance of Nature. But today, we are on the cusp of an epoch-making transition, from being passive observers of Nature to being active choreographers of Nature. The Age of Discovery in science is coming to a close, opening up an Age of Mastery.