I hold the world speed record downhill, in a Rover. I think it was 17 kilometers per hour, downhill.

We went into darkness after being in daylight the whole time on the way to the Moon. And then we went into darkness. And we're in the shadow... of the Moon.

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.

The mass gross absence of sound in space is more than just silence.

Perhaps the two greatest moments of my life were standing on the moon and being outside of the room when my granddaughter was born! We tend not to remember the worst.

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.

The moon is bland in color. I call it shades of gray. You know, the only color we see is what we bring or the Earth, which is looking down upon us all the time. And to find orange soil on the moon was a surprise.