You exist during a brief moment in cosmic history.
Fact #3140
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Black holes can slow time so much that seconds near them equal years far away.
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The center of the Milky Way contains a supermassive black hole.
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Black holes can slow time so much that seconds near them equal years far away.
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The International Space Station travels at about 28,000 kilometers per hour.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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The Apollo 11 mission successfully landed humans on the Moon.
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The Moon always shows the same face to Earth.
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The Earth's atmosphere gradually fades into space.
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