Earth

Which layer of Earth's atmosphere is the very edge of space?

More Questions from Earth
What is another name for green beryl?
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When is Earth day every year?
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In weather terms, what is the opposite of heat?
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Whose calculation of the size of the earth's diameter was almost exact?
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What storm produces lightning?
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On which canal would a traveler find Port Said?
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The coldest recorded temperature on Earth, -128 degrees F., was taken where?
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What percentage of the earth's water is drinkable?
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