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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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
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In the last 7 years, humanity has discovered 43 potentially habitable planets.
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Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
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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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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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Mars had an oxygen-rich atmosphere around 4 billion years ago
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