Sound travels about 4 times faster in water than in air.
408
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
One 75-watt bulb gives more light than three 25-watt bulbs.
57
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Iron weighs more after it rusts.
16
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65