Why Our Bodies Covered With Hair ?

Researchers suspect even ancient woman who became the ancestors of humans is likely to prefer men body hair thicker , because the free fleas and parasites .

Body hair does not seem useful for today's modern man . But it turns out the hair can help us detect parasites .

Researchers suspect even ancient woman who became the ancestors of humans is likely to prefer men body hair thicker , because the free fleas and parasites .

When compared with the apes , who became the closest relatives of man, body hair does look much less . But the density of hair follicles in our skin is actually as much of the human apes .

Fine hair that covers the body is thought to be characteristic of the process of evolution remaining human ancestor whose body was tightly covered with fur .

Now researchers found that fine hair proved to be extremely useful , especially in detecting the presence of bedbugs .

"I led a research group that tries to understand the biology of blood -sucking insects , " said Michael Siva - Jothy , evolutionary ecologist at the University of Sheffield in England .

" We wanted to find a way to control these insects effectively and prevent the spread of the insect -borne diseases . "

The researchers recruited 29 students through Facebook and shave one of their arms . Researchers tested how long the students detect bedbugs are placed in each arm and how long these parasites find the best location to eat .

The research found that body hair helps people detect the presence of bedbugs . The existence of fleas in the hair-bearing hands much faster than the arm known " bald " , because the hair serves as a motion detector . Hair also slows the movement of the parasite to find a location

eat .

Men are far more rapidly detect the parasite body hair than women because men are more dense thanks to their high levels of testosterone .

But that does not mean women are more often bitten . Therefore , bedbugs usually prefer to bite on the ankle , which rarely hairy .