"I'm not saying I'm a genius. I'm just saying I have a lot of questions."

"Curiosity and the urge to solve problems are the great forces of human nature."

"I'm often asked if I believe in UFOs. I'm open to the possibility, but I need evidence. I need the aliens to land on the White House lawn, or at least in my backyard, and say hello."

"The most important thing is to never stop asking questions."

"We spend the first year of a child's life teaching it to walk and talk and the rest of its life telling it to sit down and shut up. Is it any wonder the world is in the mess it's in?"