Space

Backward-moving black holes are more powerful

New space computer program thinks like us

Two giant black holes reveal bizarre behavior

Astronauts spill secrets to space toilet training

Gigantic airship will also serve as 'stratellite'

Scientists may have discovered the origin of life

Color-changing planets could reveal alien life

Space Shuttle Atlantis: Things you didn't know

Mars likely to remain free of Earth's microbes

Astronauts work in space, or 65 feet underwater

Aerospace pioneer plans private moon base

Hawking reveals realistic ideas for time travel

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