Posted : 8 years ago

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 1,77m (5’8″) for Swedes, and 1,78m (5’8.5″) for the Dutch.

A person remains conscious for eight seconds after being decapitated.

We have four basic tastes. The salt and sweet taste buds are at the tip of the tongue, bitter at the base, and sour along the sides.

In 1900, a person could expect to live to be 47. Today, the average life expectancy for men and women in developed countries is longer than 70 years.

The bones in your body are not white – they range in color from beige to light brown. The bones you see in museums are white because they have been boiled and cleaned.

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Posted : 8 years ago

The colored part of the eye is called the iris. Behind the iris is the soft, rubbery lens which focuses the light on to a layer, called the retina, in the back of the eye. The retina contains about 125 million rods and 7 million cones. The rods pick up shades of grey and help us see in dim light. The cones work best in bright light to pick up colours.

Your mouth produces 1 liter (1.8 pints) of saliva a day.

Over the last 150 years the average height of people in industrialized nations increased by 10 cm (4 in).

In the Middle Ages the length from the tip of the middle finger to the elbow was called an ell.

Fingernails grow nearly 4 times faster than toenails.