I knew Pluto was popular among elementary schoolkids, but I had no idea they would mobilize into a 'Save Pluto' campaign. I now have a drawer full of hate letters from hundreds of elementary schoolchildren (with supportive cover letters from their science teachers) pleading with me to reverse my stance on Pluto. The file includes a photograph of the entire third grade of a school posing on their front steps and holding up a banner proclaiming, 'Dr. Tyson - Pluto is a Planet!'

Part of knowing how to think is knowing how the laws of nature shape the world around us. Without that knowledge, without that capacity to think, you can easily become a victim of people who seek to take advantage of you.

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

Facts are true whether or not you believe them.

When students cheat on exams, it's because our school system values grades more than students value learning.

To achieve this density of a neutron star at home, just cram a herd of 50 million elephants into the volume of a thimble.

There's no denying the public's appetite for cosmic discovery.