Cosmic rays constantly bombard Earth from space.
Fact #1621
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The Moon's gravity influences ocean tides.
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The Bell Labs experiment led to the discovery of the cosmic microwave background.
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The Earth's atmosphere gradually fades into space.
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The Apollo 11 mission successfully landed humans on the Moon.
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The surface of Venus is hidden beneath thick clouds.
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The observable universe is about 93 billion light‑years wide.
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Mercury has no substantial atmosphere to trap heat.
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Light from distant galaxies shows us the past.
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