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Mars, the Red Planet, Was Once Blue

Mars once had rains, rivers, and in the northern hemisphere, a vast sea.

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The Planets: Inner Worlds

The rocky planets have similar origins, but only 1 supports life. Was it always this way?

The Planets: Jupiter

Jupiter's massive gravitational force has made it a wrecking ball and a protector of Earth

The Planets: Saturn

NASA's Cassini reveals the mysteries of Saturn's ringsā€”and new hope for life on a moon.

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