Science
What do our bodies need from the air we breathe?
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Which planet was discovered in 1781 with the help of Bode's Law?
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About how many years does it take for Pluto to go around the Sun for a complete revolution?
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What is a collection of different types of tissue to perform a specific function?
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How many astronauts walked on the moon before 1970?
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Which inhospitable desert holds the world's richest deposits of dinosaur remains?
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Which scientific term means "a small body of water"?
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