Mars had an oxygen-rich atmosphere around 4 billion years ago
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A cow produces around 200,000 glasses of milk in her lifetime.
373
There are so many kinds of apples that if you ate a new one everyday, it would take over 20 years to try them all.
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You forget 90% of your dreams.
256
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
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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