Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
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 bark of an older redwood tree is fireproof.
65
German chemists made a replica of a trophy the size of one molecule.
68
Most dust particles in your house come from dead skin.
48
One ragweed plant can release as many as one billion grains of pollen!
51