Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Indoor pollution is 10 times more toxic than outdoor pollution.
62
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
The average temperature at 40,000 feet above sea level is -60 F.
56
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20