One 75-watt bulb gives more light than three 25-watt bulbs.
57
The average temperature at 40,000 feet above sea level is -60 F.
56
One barrel of petroleum holds 42 gallons.
20
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Iron weighs more after it rusts.
68
Out of all the senses, smell is most closely linked to memory.
146
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Sound at the right vibration can bore holes through a solid object.
134