【推荐2】Wearing ties (领带) was originally the mark of Britain’s most powerful classes. That made the tie itself a symbol of power and respect. And this led the tie to be adopted by a much larger tribe (群体) — the business tribe.

You cannot wear a tie if you work with machinery. So wearing a tie became a sign that you were a man who used his brain to make a living, rather than his hands. It showed you were serious. It showed you were a professional. It meant that everyone who wanted a job in business had to wear one. It was just impossible to take seriously a man who didn’t wear a piece of coloured silk around his neck. This is how millions of people came to be wearing ties across the world. They are part of the uniform of business.

“Ties offer a point of difference,” says John Milne, head of the British Guide of Tie Makers. “They give a chance to say something about their owner’s personality.”

So if you happen to meet a man with a very brightly coloured tie, there’s a good chance that he is the office joker. There’s also a good chance that he will be wearing brightly coloured socks.

Is there a future for ties? The signs are not promising. Tie wearing seems to be rare among the new breed of entrepreneurs(企业家) in the Internet and new technology industries. Many political leaders now go without ties. This shows they are men of the people — but not the people wearing ties.

Up until around 1960, it was common for men across the Western world to wear hats as part of their business uniform. That changed with the election of John F. Kennedy to the presidency of the United States. Kennedy never wore a hat — in fact his nickname was “hatless Jack”. Seeing that the most powerful man in the world did not have to wear a hat, millions of other men decided that they did not have to either. Hats simply vanished across the Western world. Perhaps “tieless Tony” will have the same effect on ties as “hatless Jack”.

【推荐1】It seems we're always being told to get more sleep. Studies suggest spending less time on sleep can lead to obesity(肥胖) and even cancer. You might even find yourself with a head full of false memories. But rarely does science explore the dark side of sleeping too much. That's because few of us in today's busy world have the luck of exploring that option.

In an August 2018 study, published in the Journal of the American Heart Association, researchers researched the sleep patterns of those“fortunate”few and found they may not be so lucky after all. In fact, they found people who get more than eight hours of sleep have greater health risk compared to those who sleep together less than seven hours. What's more, sleep-aholics-those who manage to get 10 hours a night-stand a 30 percent higher chance of dying compared to the seven-hour crowd.

The wide-ranging global study involved(涉及) more than three million people who self-reported on their sleep habits and came to an eye-opening conclusion: If you tend to sleep a lot, you may want to buy an alarm clock. As with all things in life, sleep is best taken in moderation（适度）.

You may be thinking: What if I only sleep in on Saturday and Sunday, am I still at risk? The answer is yes, according to a 2019 study published in Current Biology.   Researchers discovered that even if a person sleeps more   than seven hours on the weekends but still sleeps less than that on weeknights, they are at risk of gaining weight   and developing sensitivity to insulin, which controls the level of sugar in blood.

For the study, 36 participants were divided into three groups that each had a different sleep schedule: nine   hours every night, five hours every night, and five hours from Monday to Friday and sleeping much on   weekends. People who get too much sleep tend to feel tired and lack energy. Also, both sleep-deprived（睡眠不足的) groups consume more food and gain weight.

【推荐2】Although most people know there are Seven Wonders in the Ancient world, only few people can name them. This is because most of them are no longer there except the pyramids. However, there is a growing list of wonders of the world today.

About nine years ago, UNESCO’s World Cultural and Nature Heritage (自然文化遗产) List had 411 places and 136 countries were responsible to protect them, and the list keeps on growing. Usually it is the task of a group of 21 experts to decide which places go on the list. The experts are chosen to work for six years. Their work is to examine and discuss the suggestions from different countries. They also manage the World Heritage Fund (基金)which can offer help to countries for protection work. Over the past centuries a lot of cultural or historic places have been destroyed by man or nature. Protecting our natural and cultural heritage is a long and difficult task. Earthquakes, floods, pollution, wars, or even tourism are some of the dangers that harm the heritage.

When a historic place is in great danger, it is put on the World Heritage in Danger List and necessary things will be done to protect it. Places which are on the danger list include Historic Bridges of Indiana, St. Elizabeth’s Hospital, Rosenwald School in Southern U.S., etc.