The Opportunity rover on Mars was designed for a 90-day mission but operated for over 14 years.
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The Kepler mission searched for Earth-like exoplanets.
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In 1977, a mysterious signal known as the 'Wow! signal' was detected from space.
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The Wow! signal was a strong radio signal detected in 1977 that has never been fully explained.
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Dark energy is thought to drive the accelerating expansion of the universe.
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The Earth's magnetic north pole moves over time.
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Supernovae can briefly outshine entire galaxies.
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Project Mercury was the first U.S. human spaceflight program.
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The Bell Labs experiment led to the discovery of the cosmic microwave background.
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