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
Pumice is the only rock that floats on water.
14
Cold water weighs more than hot water.
93
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15