9 discoveries about us in 2009

For thousands of years, people have been studying themselves, and we think we know all about ourselves. However, science has never stopped exploring the highest animals on Earth, especially in terms of physical, mental and cultural. Here are 9 new discoveries about ourselves in 2009:

1. Adults have baby fat

Scientists have long believed that brown fat, which is only present in babies, disappears into adulthood. But a study published in the 2009 New England Journal of Medicine found that some adults actually still have brown fat - thought to be 'good' fat because it burns calories. With the discovery of lean people more likely to have brown fat, scientists believe that this type of fat may play a role in regulating body weight. Stimulating the body to produce brown fat promises to become a new therapy against obesity.

2. Your skin is full of bacteria

Researchers increasingly know more about the bacteria that reside inside and on our bodies through the Human Microbial Project. Research results this year show that different bacterial populations reside in different areas of our skin. The most diverse are the forearm with 44 different species.

3. Late sleepers are more alert than people who wake up early

People who are awake early in the morning may have more time to do things but they have to pay: the ability to concentrate may not be as long as the person who sleeps late and still gets drunk when dawn breaks. The results of the concentration of early risers and late sleepers at 2 time points: 1.5 hours and 10.5 hours after waking show that both groups maintain the same level of alertness after 1.5 hours to wake up. However, latecomers who maintain their ability to concentrate better than those who wake up early after 10.5 hours leave the bed. Therefore, if you have a habit of starting a new day at dawn, you may want to consider before planning an important meeting in the afternoon.

4. Please 'pour' words into the right ear?

If you want to ask someone, it's better to say in their right ear. The result of a study proves that we tend to receive better information in the right ear, and more likely to be willing to take the test if the request is poured into the right ear. This bias may stem from the fact that speech goes to the right ear, most of which is handled by the left hemisphere, which is responsible for verbal information processing.

5. Do many things at the same time very badly

You think you have the ability to take on many jobs at the same time because you are all familiar with those things, right? Not really, a study this year shows that people who do a lot of things are actually not good at what they don't want to say, which is worse than those who do all this and then others. Research results show that people who do many things at the same time often work longer, and when they have to move to other jobs, their work speed is slower than those who focus on doing one thing. The study provides more evidence for controversy, which is a situation where multiple things like driving and texting are not wise and can even be dangerous.

6. Most children lack vitamin D

Surveys of children across the United States show that about 70% have vitamin D deficiency - a shocking result for professionals. This large-scale deficiency of vitamin D is thought to be due to a lack of diet and too little exposure to sunlight. When vitamin D is lacking, the body is more prone to osteoporosis and cardiovascular disease.

7. Babies cry in their mother tongue

Even if the baby is only a few days old, the cry sounds like their mother tongue - according to German researchers. For example, the cries of French babies carry the melody from the beginning to the end - typical of French. Meanwhile, baby German cries with a downward melody - characteristic of the German language.

8. 'Eating rice first' easily leads to divorce

Moving to live with your other partner before marriage is not a great idea - according to a survey by the University of Denver (USA). Accordingly, couples who live together before the wedding often indicate that the quality of their marriage is lower and they are more likely to break up than those who stay at home until they become husband and wife.

9. Why did we not know when we were born?

Scientists know why some animals, such as horses, giraffes, can get up and walk just hours after birth, while humans take about a year before being able to walk on their feet. A study published last December found that, although mammals know at different times in their childhood, they actually start going at the same time during brain development. the set.