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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Your body is creating and killing about 2.4 million red blood cells per second.
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The largest breed of rabbit is the Flemish Giant.
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Iceland has been so culturally isolated through history since the Vikings, that compared to other Scandinavian counties, people who speak Icelandic can still read the old Norsk sagas.
4
Your thumb is about the same size as your nose.
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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 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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