A sea star can regrow lost arms.
Fact #425
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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Some stars collapse into black holes at the end of their life cycle.
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The Hubble Space Telescope revolutionized deep-space imaging.
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Time moves slower in gravity.
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The Sun will eventually expand into a red giant.
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Black holes can slow time so much that seconds near them equal years far away.
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Black holes can slow time so much that seconds near them equal years far away.
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The light you see from some stars today began traveling before humans existed.
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