Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Sound travels fifteen times faster through steel than through air.
134
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
One ragweed plant can release as many as one billion grains of pollen!
51