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A video taken by cosmonaut Oleg Artemyev 2018 at the ISS.

Raleigh, the scientist who defined the reason for the blue color of the sky, faced a big question: Why is the color of the sea blue? Raleigh explained that the reflection of the sky is the reason for the blue...

The Moon has been moving away from the Earth for 4.5 billion years. This animated image from NASA shows how far the Moon has come from Earth. The Moon is moving away from the Earth at a rate of 3.78cm...