In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
A cow produces around 200,000 glasses of milk in her lifetime.
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The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12
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.
21
You forget 90% of your dreams.
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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.
13
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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