Sometimes luck is with you, and sometimes not, but the important thing is to take the dare. Those who climb mountains or raft rivers understand this.

People have alleged that I have inspired many young people over the years, but I say, it was just the opposite.

While the death of young men in war is unfortunate, it is no more serious than the touching of mountains and wilderness areas by humankind.

Understanding how DNA transmits all it knows about cancer, physics, dreaming and love will keep man searching for some time.

For how many people do you think might yet stand on this planet before the sun grows cold? That's the responsibility we hold in our hands.

A great deal of pressure was then built up to remove me from the club and my resignation was, finally, a forced one.

Once we open the door to the plutonium economy, we expose ourselves to absolutely terrible, horrifying risks from these people.