There's no debate about the greenhouse effect, just like there's no debate about gravity. If someone throws a piano off the roof, I don't care what Sarah Palin tells you, get out of the way because it's coming down on your head.

The truth is, we have this idea that late night is about creativity and being cool, but that's not our job. Our job is to get as many people watching the commercials in between our show. That's the reality of it.

Real emotion is good - or doing a good job of faking real emotion.

I definitely feel pressure to keep slim. I don't want to be the guy who lost weight and gained it all back. But it's hard. Sometimes I'll gorge and gain nine pounds in a weekend somehow, and I get bummed about it.

As for my own fitness, with my packed schedule, I try to mix it up with different things every day. That includes powerlifting, isometrics, yoga, sprints, jogging, and, of course, wrestling. I've learned that all you need to do is move and do different things to challenge yourself.

While most Americans have access to the best oral health care in the world, low-income children suffer disproportionately from oral disease.

Medical costs are soaring because our health-care system is totally screwed up. Doctors and hospitals have every incentive to spend on unnecessary tests, drugs, and procedures.

While I've done over 10,000 heart operations and invented operations and devices that are used every day in heart surgery, the joy I receive from watching even one person take back their health just can't be surpassed, and certainly can't be measured monetarily.