The University of Oxford (teaching since 1096) predates the Aztec empire (1428 - 1521).
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
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A cow produces around 200,000 glasses of milk in her lifetime.
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In the last 7 years, humanity has discovered 43 potentially habitable planets.
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