Our best shot at finding life in our solar system might be to look at the moons of Jupiter and Saturn. Mars, increasingly, looks like a dead planet. But the oceans beneath the ice cover of the moons of Jupiter and Saturn may actually have more liquid water than the oceans of Earth.

I would hope that the publicity around the Higgs boson would increase the public awareness of physics and cosmology.

We have learned more about the brain in the last fifteen years than in all prior human history, and the mind, once considered out of reach, is finally assuming center stage.

Once confined to fantasy and science fiction, time travel is now simply an engineering problem.

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

Growing new organs of the body as they wear out, extending the human lifespan? What's not to like?

Already from your own cells scientists can grow skin, cartilage, noses, blood vessels, bladders and windpipes. In the future, scientists will grow more complex organs, like livers and kidneys. The phrase 'organ failure' will disappear.