Mars is the fourth planet from the sun and has a distinct rusty red appearance and two unusual moons. The Red Planet is a cold, desert world within our solar system. It has a very thin atmosphere, but ...
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Mars quiz: How well do you know the Red Planet?
Get ready to explore the Red Planet — our dusty, windswept neighbor that's captured human imagination for centuries. Mars is the fourth planet from the sun and a top contender for future space ...
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