Natural gas is not a bridge - it's a gangplank.

We know how to get all of the energy we need without using dirty or dangerous fuel sources. It is no longer a question of whether we can - but of whether we will

Paradigm shifts aren't always obvious when you're in the middle of one. Danny Kennedy makes a compelling case for why solar power is the crucial energy technology of the 21st century.

After an exhilarating whitewater ride through America's love-hate relationship with its rivers, Daniel McCool leaves us inspired and hopeful for a happy ending.

Sometimes, if you get too close to a subject you can miss what’s most important.

But I am a just man, even to my enemy—and I will acknowledge, beforehand, that they are cleverer brains than I thought them.

The heart has its reasons; it's the mind that's suspect.

It is possible that mankind is on the threshold of a golden age; but, if so, it will be necessary first to slay the dragon that guards the door, and this dragon is religion.

I wanted not to make photographs that would be art, but art that would be photography.

Most of us employ the Internet not to seek the best information, but rather to select information that confirms our prejudices .

I know, but no matter what I choose I have to live with it. Forever. I have to be able to go forward and not look back anymore. Can you understand that?

They call it 'falling in love' because it's less like stepping and more like tripping. Tripping is the part where you're still trying to remain upright

I've often felt depressed; everyone feels depressed.

Wisdom is obtained by reading the mind of God.