In the last 7 years, humanity has discovered 43 potentially habitable planets.
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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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The strangers in your dreams are actually people that you've seen in real life.
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If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
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Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
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