"The more I learn about the universe, the less convinced I am that there’s some sort of benevolent intelligence behind it."

"The greatest value of a human life is to ask questions."

"I'm a fairly aggressive tweeter. I like to engage with people who disagree with me, and try to educate them."

"If you are scientifically literate, the world looks very different to you, and that difference, I think, is a difference for the better."

"I'm not trying to be controversial. I'm just telling you what the universe is telling us."