Pluto's orbit is so elongated that it crosses the orbit of another planet. Now that's... you've got no business doing that if you want to call yourself a planet. Come on, now! There's something especially transgressive about that.

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• Neil deGrasse Tyson:

  If you get asteroids about a kilometer in size, those are large enough and carry enough energy into

• Neil deGrasse Tyson:

  It's part of our pop culture to give animals human personalities and talents.

• Neil deGrasse Tyson:

  When we see animals doing remarkable things, how do we know if we're simply seeing tricks or signs

• Neil deGrasse Tyson:

  In the animal kingdom, one of the keys to survival is to outwit your enemies. And when you're surro

• Neil deGrasse Tyson:

  Dreams about the future are always filled with gadgets.

• Neil deGrasse Tyson:

  Pretty much every plant and animal alive today is the result of eons of natural cross-breeding.

• Neil deGrasse Tyson:

  We are part of this universe; we are in this universe, but perhaps more important than both of thos

• Neil deGrasse Tyson:

  I don't comment on the physics errors of 'Star Wars,' all right. I just - you let that one go.

• Neil deGrasse Tyson:

  If you're a scientist, and you have to have an answer, even in the absence of data, you're not goin

• Neil deGrasse Tyson:

  Any astrophysicist does not feel small looking up at the universe; we feel large.