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Space exploration and travel

Scientists use data from the New Horizons mission to illuminate the mystery.

Charles Q. Choi, Contributor

The futuristic ideas from the original "Star Trek" series have inspired today's technology.

Emilie Lorditch, Staff Writer

Observations of the region beyond the planet Neptune are giving astronomers fresh understanding of our solar system's history – and may reveal a new planet.

Peter Gwynne, Contributor

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