Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Sound travels about 4 times faster in water than in air.
408
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
A cubic yard of air weighs about 2 pounds at sea level.
31
The bark of an older redwood tree is fireproof.
65
One 75-watt bulb gives more light than three 25-watt bulbs.
57
At 15 years old, Jack Andraka invented a method of diagnosing pancreatic cancer, thus helping to save the lives of millions of people around the world. It is 168 times faster, 26,000 times cheaper, 400 times more sensitive, and has a 99% success rate.
15
The left ear is more responsive to words of love and emotion whispered into it than the right.
40