The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
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If Earth's history was condensed into twenty-four hours, life would've appeared at around 4am, land plants at 10:24pm, dinosaur extinction at 11:41pm, and human history would’ve began at 11:58:43pm.
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The University of Oxford (teaching since 1096) predates the Aztec empire (1428 - 1521).
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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Cows can sleep standing up, but they can only dream lying down.
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Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
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The oldest glowing lightbulb was first switched on in 1901 and lives in fire stations in Livermore, CA. It is known as the Centennial Light.
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Only about 2% of the world population has green eyes.
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