看到一些有关人类的fun facts:

        People say "Bless you" when you sneeze because when you sneeze,your heart stops for a mili-second.
         If you sneeze too hard, you can fracture a rib.
         If you try to suppress a sneeze, you can rupture a blood vessel in your head or neck and die.
         If you keep your eyes open by force when you sneeze, you might pop an eyeball out.
         Wearing headphones for just an hour will increase the bacteria in your ear by 700 times.
         In the course of an average lifetime you will, while sleeping, eat 70 assorted insects and 10 spiders.
         Most lipstick contains fish scales.
         Like fingerprints, everyone's tongue print is different.
         Over the last 150 years the average height of people in industrialised nations has increased 10 cm (about 4 inches). In the 19th century, American men were the tallest in the world, averaging 1,71m (5'6"). Today, the average height for American men is 1,75m (5'7"), compared to 1,77 (5'8") for Swedes, and 1,78 (5'8.5") for the Dutch. The tallest nation in the world is the Watusis of Burundi.
In 1955 the richest woman in the world was Mrs Hetty Green Wilks, who left an estate of $95 million in a will that was found in a tin box with four pieces of soap. Queen Elizabeth of Britain and Queen Beatrix of the Netherlands count under the 10 wealthiest women in the world.
           Every human spent about half an hour as a single cell.
            Every year about 98% of atoms in your body are replaced.
           On average, half of all false teeth have some form of radioactivity.
           Your stomach produces a new layer of mucus every two weeks - otherwise it will digest itself.
          The strongest muscle in the body is the tongue.
          Banging your head against a wall uses 150 calories a hour.
         The human heart! creates enough pressure when it pumps out to the body to squirt blood 30 feet.
         If you farted consistently for 6 years and 9 months, enough gas is produced to create the energy of an atomic bomb.
        If you yelled for 8 years, 7 months and 6 days you would have produced enough sound energy to heat one cup of coffee.
         The average person laughs 10 times a day!
A man named Charles Osborne had the hiccups for 69 years.
        More people are allergic to cow’s milk than any other food.
         More people are killed each year from bees than from snakes.
        Fingernails grow nearly 4 times faster than toenails!
Like fingerprints, everyone’s tongue print is different!
One quarter of the bones in your body, are in your feet.
Your ribs move about 5 million times a year, everytime you breathe!
            Right handed people live, on average, nine years longer than left-handed people.
          Your heart beats over 100,000 times a day.
           Human thigh bones are stronger than concrete.
           Every person has a unique tongue print as well as fingerprints.
          Your stomach produces a new layer of mucus every two weeks - otherwise it will digest itself.