The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
Scientists aren't sure what color dinosaurs were.
312
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Research indicates that plants grow healthier when they are stroked.
173
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.
15
The earth is approx. 6,588,000,000,000,000,000 tons.
175