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nr intv keilar bill nye rosetta mission comet landing_00000924.jpg
nr intv keilar bill nye rosetta mission comet landing_00000924.jpg

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    Comet mission may solve age-old mystery

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Comet mission may solve age-old mystery

Scientist Bill Nye explains why the Rosetta mission to land a robot on a comet could advance science.

Comet mission may solve age-old mystery

Scientist Bill Nye explains why the Rosetta mission to land a robot on a comet could advance science.