SpaceX successfully tests engine for Mars travel

Elon Musk's SpaceX successfully tested a new rocket engine designed to take people to Mars within the next decade.

The Raptor engine, according to Musk, would be used for a manned Mars mission by 2025. He's also said his company would send an unmanned mission to Mars by 2018.

NASA in June  test fired its Space Launch System booster rocket, also designed to send people to Mars.

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