The Earth's atmosphere weighs about 5.5 quadrillion tons.
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A cesium atom in an atomic clock beats over nine billion times a second.
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When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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Most dust particles in your house are made from dead skin!
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4.5 pounds of sunlight strike the Earth each day.
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At 15 years old, Jack Andraka invented a method of diagnosing pancreatic cancer, thus helping to save the lives of millions of people around the world. It is 168 times faster, 26,000 times cheaper, 400 times more sensitive, and has a 99% success rate.
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Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
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