In five billion years, the sun will expand and engulf our orbit as the charred ember that was once Earth vaporizes. Have a nice day

What would aliens say when told earthlings shift clocks twice a year to fool themselves into thinking there's more sunlight?

We fail in even the simplest of all scientific observations-nobody looks up anymore.

My goal is not to shove information into your head. It's to find ways to reignite the curiosity that we all had as children for the natural world. You don't have to tell a child to explore the backyard.

My popularity does not derive from me pandering to people. People came to me. I don't tell anyone to follow me on Twitter. I don't tell people to like my Facebook page. I don't tell people to fill the venue. I'm offered to people, and then people come.

We are part of this universe; we are in this universe, but perhaps more important than both of those facts, is that the universe is in us.

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.