Science is the key to our future, and if you don't believe in science, then you're holding everybody back.

Not wasting any water bottles is good. Not leaving the lights on is good. Turning the thermostat down in the winter, up in the summer, is good. But the best thing any of us in the developed world, especially in the United States, can be doing is talking about it.

I like to regard myself as someone who's capable of critical thought, that is to say, who can evaluate claims.

Intuitively you want some place [such as your phone] to store phone numbers, so you have that part of your brain to do other tasks.

The theory of evolution was not formally published until shortly before Faraday's death. Evolution was yet to be discovered during Faraday's life. Also, I don't think that Michael Faraday would claim that the Earth is extraordinarily young.

Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.

There are two ways to be rich: to have more or need less. It's estimated that we squander about 30 percent of our energy leaving the lights on, the refrigerator door open, and so on. Then there is the enormous amount of food that we expend huge amounts of energy to raise and then throw away.