If the chemical sodium is dropped into water it will immediately and violently explode.
67
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
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
One 75-watt bulb gives more light than three 25-watt bulbs.
57