Our astronauts, when they go orbiting around the earth, they actually come back slightly younger than a twin that they would have on the planet Earth who was stationary. This is called the twin paradox.

As a young boy growing up in rural India, most of what I knew of the world was what I could see around me. But each night, I would look at the Moon - it was impossibly far away, yet it held a special attraction because it allowed me to dream beyond my village and country, and think about the rest of the world and space.

There's an unconscious bias in our society: girls are wonderful; boys are terrible. And to be a boy, or young man, growing up, having to listen to all this, it must be painful.

We should be teaching young girls to take up space. Nothing is as important as taking up space in society and cementing yourself.

I think that society has to be careful not to shift all of its resources to the elderly versus the young.

There is so much potential out there in young people and they aren't getting the right information or being encouraged in the right ways. This is our duty as a society.

The feminist movement is not about success for women. It is about treating women as victims and about telling women that you can't succeed because society is unfair to you, and I think that's a very unfortunate idea to put in the minds of young women because I believe women can do whatever they want.

I was a Great Society liberal on domestic issues. People ask me, 'How do you go from Walter Mondale to Fox News?' The answer is, 'I was young once.' End of answer.

I think it's child abuse to have someone in the public eye too young. Society basically values wealth and fame and power at the cost of well-being. In the case of a child, it's at the cost of someone's natural development. It's already hard enough to develop.

Today the world changes so quickly that in growing up we take leave not just of youth but of the world we were young in.

Mothers of all ages delight in their children, but I don't know that, if I were younger, I would feel as acutely, profoundly, preciously grateful for every smile, squeal, and - yes - diaper blowout.

I remember when we were called 'colored,' and Dr. King would always tell young people not to get upset at what people called you. He said if it is not the name your mother gave you, then smile, keep walking, and that's exactly what we did.

When I was younger, I'd go to the Museum of Television and Radio in New York and watch this beautiful clip of Billie Holiday playing with a bassist, a pianist and Gerry Mulligan, who was a friend of mine, on baritone sax. At one point, she looks over at Gerry, and they just smile. When those moments happen, it's just lovely.

As a youngster, my mother and father always drilled into my head having something to fall back on. My father was kind of funny. I'd score 40 points. I'd come home and say, 'Look dad, I scored 40.' He'd never have a smile on his face. He'd be like, 'I saw that move you did. What if you'd hurt your knee?'

Always wear a smile sometime during the day - it makes you feel happier and look younger.

I am so saddened and grossed out by young women who look like creepy, old aliens because of their new Barbie noses and lips. Is that a smile or a grimace?

From a very young age, music was very much in my house. I would sit with my mom, with the old LPs, listening to The Beatles and Carly Simon and Lionel Richie. The old LPs used to have the lyrics. From there, I would put on dance and music displays for my family, just to entertain them and make people laugh and smile.

I don't really remember a time younger than 5 years old that I didn't have skates on because all I can remember is every day, tying up my skates and a big smile on my face, excited to go on the ice.

When I see these young girls who are dreaming the dream that I'm living, it's very very exciting and it puts a big smile on my face.

I wish I was told to look after my teeth when I was younger. My smile is really important to me and one of my biggest assets, so I'm very conscious that I need to keep it in top condition.

Young girls and boys from all around the world let me know their personal story, and I can feel their smile through their words. To be able to look at those comments and just get encouragement from them and know that I am living the life that I'm supposed to is what keeps me going every day.

By coincidence and not design, 'Everstar' is written and drawn by an all-female creative team, and it makes me smile to think that there may be young female readers out there, future writers and artists, who get to see that comics doesn't have to be a 'boys' club.'

Just as the lunar landings inspired many young people to consider careers in space and related fields, the solution of the challenging instrumentation problems presented in space science can inspire young people to push beyond the current state of the art.

As scientists, we step on the shoulders of science, building on the work that has come before us - aiming to inspire a new generation of young scientists to continue once we are gone.