What are the lessons to be learned from this journey of the mind through the universe? That humans are emotionally fragile, perennially gullible, hopelessly ignorant masters of an insignificantly small speck in the cosmos. Have a nice day.

If you love what you do, you'll be your best at it compared to anything else you might have chosen as a career. Or at least you will love it more, and you won't lead a depressed day of your life.

If an artist is reaching for the universe as a source of creative muse, then I'm there. I'm gonna say, "Yeah. Here's Saturn. Here's a black hole. Here's twisted space-time. Talk to me. What do you need? What do you want?" And I'll just feed you, because I think only then does science become mainstream - when science becomes a legitimate topic for artists.

It is astonishing to realize that until Galileo performed his experiments on the acceleration of gravity in the early seventeenth century, nobody questioned Aristotle's falling balls. Nobody said, Show Me!

If Mars formed life, then life on Earth could have been seeded by life on Mars, making every life form on Earth descended from Martians.

Politics will take whatever shape it needs for people to get elected. But at the end of the day, the population remains and that's really, as an educator, who I care about.

Modern science is under no obligation to satisfy the expectations of your five senses.