One 75-watt bulb gives more light than three 25-watt bulbs.
57
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Nylon is made from coal and petroleum.
42
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Your brain is 80% water.
525
Most dust particles in your house come from dead skin.
48