Mars had an oxygen-rich atmosphere around 4 billion years ago
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If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
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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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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
Your body is creating and killing about 2.4 million red blood cells per second.
17
The strangers in your dreams are actually people that you've seen in real life.
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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.
16
Only about 2% of the world population has green eyes.
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