Cold water weighs more than hot water.
93
The average temperature at 40,000 feet above sea level is -60 F.
56
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
One ragweed plant can release as many as one billion grains of pollen!
51
One 75-watt bulb gives more light than three 25-watt bulbs.
57
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199