As I look back over my life, before I had any real identity, I was a traveler. I grew up an Army brat, a runaway, an activist, and a musician. All my life I've been traveling.

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• Ellen Stofan:

  What we expect to find, certainly in our own solar system, are probably simple single or multiple-c

• Ellen Stofan:

  I always like to say just think you were a doctor with only one patient. You might understand how t

• Ellen Stofan:

  Humans can actually read a landscape, go through a lot of rocks - crack them open, throw them, pick

• Ellen Stofan:

  We like to talk about pioneering Mars rather than just exploring Mars, because once we get to Mars,

• Ellen Stofan:

  It's part of the human character to want to know what's over the next hill, to want to know what's

• Ellen Stofan:

  So many people I talk to who work in technology, you ask them, 'What got you interested in science?

• Ellen Stofan:

  Being able to have a laboratory on Mars, being able to have some sort of sustained human presence o

• Ellen Stofan:

  If you think of the Apollo capsule coming into Earth with a parachute, the Mars atmosphere is just

• Ellen Stofan:

  My key aim is to get man on the surface of Mars by the mid-2030s.

• Ellen Stofan:

  I live an hour from NASA's HQ in Washington, D.C., and sitting in a jam stresses me out.