Beauty sleep is a real thing, researches have shown that people who have enough sleep look more attractive(有魅力的) to others.

A few bad nights is enough to make a person look "especially"more ugly, their sleep experiments show.

The researchers asked 25 university students to join in their sleep experiment. They were asked to get a good nights sleep for two nights A week later, they were asked to sleep for only four hours every night for two nights in a row(接连).

The researchers took make- up free photos of the volunteers .after both two nights’ good sleep and two nights’ bad sleep.

Next, they asked 122 strangers to have a look at the photos and judge them on attractiveness ,health, and sleepiness, as well as asking them, “How much would you like to make friends with this person in the picture?

The, strangers were good at judging if the person they were looking at was tired, and, if they were sleepy, their attractiveness score. was low The strangers also said they wouldn't want to make friends with the tired students. The researchers say this is natural for people. An unhealthy-looking face makes people, run away. In other words, people don t want to hang around with people. Who might be rill It meant that strangers wanted to make friends who were attractive and energetic.

Dr Brewer, an. expert at the. University of Liverpool said Judgement of attractiveness. is. Often unconscious, but we, all do it, and we are able to judge on even something small like whether someone looks tired or unhealthy This study shows-how important sleep is to us.”

Did you know that bread is one of the earliest human inventions?

Bread is a food made of flour and water. Other ingredients and shapes can also be found. Scientists have learned that humans have been eating bread in some form or another for 30,000 years.

Archaeologists(考古学家) have discovered pictures of bakeries(面包房) and bread in ancient Egyptian(埃及的) archaeological sites. It is believed that bread bakeries and home-bakers used the same skills. In fact, because they had no potatoes or rice, bread was the most important in the ancient Egyptians’ diet.

Egyptians used a grain much similar to wheat for their bread. The grain was broken by hand into flour on stone. The flour was mixed with water and salt. It was placed in a pot and baked in a clay oven. This Egyptian bread was a flatbread. Indian naan, similar to pizza, is a good example of flatbread eaten today. However, around 300 BC, Egyptian bakers added to their bread an important ingredient: yeast (酵母). It makes bread rise. Most breads today are made using those four basic ingredients: flour, yeast, salt, and water.

Bread production today is more complicated, which needs more time, patience and hard work. Yes, you can still bake your own bread at home with store—bought flour and yeast. You can also buy bread made at small bakeries. But the bread you see in grocery stores is made in large factories.