I don't require that the main guest [of StarTalk] have any science knowledge or background at all. It's just, I have a conversation with them, it's long and winding, and we find out what parts of what we learn about the person lend themselves to further scientific discussion with an expert who is brought into the studio. So that's how that comes together.

Curiosity is unknown. All adults were once kids and once curious, but as adults you don't remember that and you see curiosity when it's expressed in children as a pathway to household disaster. They're simply exploring their environment, manifesting their curiosity. So what you need to do is create an environment where curiosity is rewarded rather than punished, or thwarted.

If a scientist is not befuddled by what they're looking at, then they're not a research scientist.

We account for all the matter and energy that we're familiar with, measure up how much gravity it should have, it's one-sixth of the gravity that's actually operating on the universe. We call that dark matter. It really should be called dark gravity. We don't know what that is.

Long ago Mars was an oasis of running water.Today the Martiansurfaceis a sterile,barren desert. Here on Earth, who knows what climactic knobs we unwittingly turn,which might one day render Earth as dry and lifeless as Mars. (From the cover of Old Poison by Joan Francis)

If our solar system is not unusual, then there are so many planets in the universe that, for example, they outnumber the sum of all sounds and words ever uttered by every human who has ever lived. To declare that Earth must be the only planet with life in the universe would be inexcusably bigheaded of us.

Let's invent a new tomorrow and then make it happen. Let's invent the city of tomorrow, the home of tomorrow, the transportation of tomorrow.