“We found out the Gemini spacesuit was, well, oxygen was flowing to keep me cool as well as to breathe, and it wasn't good enough. My visor got fogged.”

“After Apollo 17, America stopped looking towards the next horizon. The United States had become a space-faring nation, but threw it away. We have sacrificed space exploration for space exploitation...”

“I do believe there is life in outer space. Mathematically, there has to be, and if you believe as I do that there is a creator of the universe, then how can we be so arrogant to believe he created ...”

“Am I willing to go to Mars? Yes, but I'm not willing to spend nine months getting there, then wait 18 more months until the planets align to come home.”

“Today, we are on a path of decay. We are seeing the book close on five decades of accomplishment as the leader in human space exploration.”

“Here I am at the turn of the millennium and I'm still the last man to have walked on the moon, somewhat disappointing. It says more about what we have not done than about what we have done.”

“We are a unique ape. We have language. Other animals have systems of communication that fall far short of that. They don't have the same ability to communicate complicated conditionals and what-ifs...”

“The Internet has given us 10 or 15 new styles of communication: long messages like blogging, and then short messages like texting and tweeting. I see it all as part of an expanding array of linguis...”

“In parenting, as in judging, the days are long, but the years are short.”

“I made spasmodic efforts to work, assuring myself that once I began working I would forget her. The difficulty was in beginning. There was a feeling of weakness, a sort of powerlessness now, as tho...”

“The role played by time at the beginning of the universe is, I believe, the final key to removing the need for a Grand Designer, and revealing how the universe created itself. Time itself must com...”

“Death isn't the end, it's the beginning.”

“So imagine that the lovely moon is playing just for you - everything makes music if you really want it to.”

“I swear that girl was born with a pen in her hand, the moon in her hair and stars in her soul.”

“We ran as if to meet the moon.”