Many people feel small because they're small and the universe is big, but I feel big.

So much of what we understand comes from knowing what something is and what that something used to be, which allows us to figure out, or at least imagine, what happened in between.

If you're really successful at bullshitting, it means you're not hanging around enough people smarter than you.

I want to encourage people to not think in terms of gifts, but think in terms of, wow. You work hard to succeed at that, because that's exactly what I do.

It turns out that the history of astrophysics is where we perfected time keeping.

Countless women are alive today because of ideas stimulated by a design flaw in the Hubble Space Telescope.

For all we know, the aliens have already done this and unwittingly concluded that there was no intelligent life on Earth. They would now be looking elsewhere. A more humbling possibility would be if aliens had become aware of the technologically proficient species that now inhabits Earth, yet they had drawn the same conclusion.