Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
According to studies, men change their minds two to three times more often than women.
72
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
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
One 75-watt bulb gives more light than three 25-watt bulbs.
57
4.5 pounds of sunlight strike the Earth each day.
27
In zero gravity, a candle's flame is round and blue.
16