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IF we form a tunnel between two poles of the earth and then there is a free fall of a marble through that tunnel ;what happens?
Is water consumpstion less in space
Velocity Of light?
What are asteroids like?
What is the earths mantle made up of
What kind of path would the planets follow if suddenly their attraction to the sun no longer existed?
What layer protects the earth
What would be the consequences of a comet hitting earth
Who is the first black astronit to go to spaces
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