One 75-watt bulb gives more light than three 25-watt bulbs.
57
The smell of freshly cut grass is actually a plant distress call.
31
The average temperature at 40,000 feet above sea level is -60 F.
56
Sound travels fifteen times faster through steel than through air.
134
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
The average home creates more pollution than does the average car.
33
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13