Since the founding of quantum mechanics in the 1920s, theoretical physics had nurtured an extremely radical tradition.
Most of physics is about energy, and physicists understand inefficiencies. I wanted to write a book about our energy options in a neutral, human-accessible form.
To rest satisfied with existing evils, as if we could do nothing, is not obedience; but neither is it obedience to imitate the actions of the apostles.
If I have succeeded better than many who surround me, it has been chiefly - may I say almost solely - from universal assiduity.
The saddest face I ever saw on Martin Luther King was at the funeral of the four little girls slain in Birmingham, Alabama.
Let's be cautious about relying so much on material things that we have no energy left for the spiritual aspects of our lives.
I had travelled pretty widely around the world even before then, so I knew where to go to film wildlife.
Somali is turning into a desert. Rwanda, you can hardly find a place to plant a potato, it's so crowded.
The most powerful argument of all for saving open space is economics; in most states, tourism is the number two industry.
I have a lot of memories of Falls Church. I went to grade school in Madison Elementary School.
Almost all these hotspots around the world, most have been destroyed to the point where there is no wildlife and very little of the natural world left.
I was amazed at the house that I grew up in; it looks practically identical to the way it was, but I couldn't recognize it because of the size of the trees.
In no other type of warfare does the advantage lie so heavily with the aggressor." James Franck, The Manhattan Project neatly summarize the atmic bomb.
What makes us human, I think, is an ability to ask questions, a consequence of our sophisticated spoken language.
It was both fascinating and appalling to learn that chimpanzees were capable of hostile and territorial behavior that was not unlike certain forms of primitive human warfare.
Certainly, if you look at human behavior around the world, you have to admit that we can be very aggressive.
One thing I had learned from watching chimpanzees with their infants is that having a child should be fun.
Here we are, the most clever species ever to have lived. So how is it we can destroy the only planet we have?
Alligators and crocodiles are some of the most aggressive creatures on the planet - they'll take down a boat if you come up to their nest.
Jail threats did not dissuade Martin Luther King - and intergenerational justice is a moral issue of comparable magnitude to civil rights.
What is frustrating people, me included, is that democratic action affects elections but what we get then from political leaders is greenwash.
