American heads are getting bigger and bigger

Modern life is directly impacting human development, including expanding the area of ​​white American skulls as well as many other nations and nations around the world.

Research by American scientists found that the skulls of people especially white Americans are rising higher and wider.

After measuring hundreds of white American skulls born between 1825 and 1985, the researchers found that the skull height increased by about 8mm.

Over the generations, human skulls have become bigger and bigger

Although the 8mm number is not too big, it has contributed to increasing the brain capacity equivalent to a tennis ball in the brain.

Anthropologist Richard Jantz of the University of Tennessee (USA) said: "The higher protruding skull makes the skull area wider, a surprising discovery for the scientific community. But previous research has shown that the larger the area of ​​the skull does not mean that people are getting smarter ".

From ancient Homo times around 30,000 years ago, human skulls evolved faster. In contrast, in the period of 5,000-6,000 years ago - when agriculture flourished, human skulls tended to shrink.

The cause of this unusual phenomenon is still a mystery, but scientists believe that when life becomes safer, food sources are more abundant, people will not have to grow to such a smart level. to survive, the skull gradually became smaller.

According to Mr. Jantz, the life of the American people is changing in many different ways, so it is impossible to specify the causes of the skull to increase the area. But it can be certain that American life is more and more comfortable and full.

Typically, the American people use cars as a means of daily transportation, children are fully vaccinated, food is abundant, so the skull increases the area and is also a reaction to adapt to the environment. new life.