Most people, when they travel to space, would like to stay in orbit (轨道) for a few days or more. And this stands to reason, if you’re paying $ 20,000 for your trip to orbit! So in order for tourism to reach its full potential there’s going to be a need for space hotels. What would a space hotel actually be like to visit? Hotels in orbit will offer the services you expect from a hotel — private rooms, meals, bars. But they’ll also offer two unique experiences: impressive views — of Earth and space — and the endless entertainment of living in zero gravity — including sports and other activities that make use of this.

The hotels themselves will vary greatly — from being quite simple in the early days to huge luxury (奢侈的) structures at a later date. It’s actually surprising that as later as 1997, very few designs for space hotels were published. This is mainly because those who might be expected to design them haven’t expected the costs to come down far enough to make them possible.

Lots of people who’ve been to space have described vividly what it’s like to live in zero gravity. There are obviously all sorts of possibilities for dancing, gymnastics, and zero-G sports. Luckily, you don’t need to sleep much living in zero gravity, so you’ll have plenty of time for relaxing by hanging out in a bar with a window looking down at the turning Earth below.

Of course all good things have come to an end, unfortunately. And so after a few days you’ll find yourself heading back to the earth. You’ll be thinking how soon you can save up enough to get back up again-or maybe you should change jobs to get to work in an orbiting hotel!

In this digital age, people measure their popularity by the number of likes and followers they get on social media. But as it turns out, people are happiest when their friends are high quality – not high quantity.

Scientists from the University of Leeds, UK, studied data from two online surveys of nearly 1,500 people. Those who took the survey gave details about their age, social interactions, and how satisfied they were with their social lives. The researchers found that those who had a small number of close friends generally tended to be happier than those who had a large number of superficial(关系浅表的)friends.

“Loneliness has less to do with the number of friends you have, and more to do with how you feel about your friends,” said Wandi Bruine de Bruin, one of the researchers.

Bruine de Bruin found that older people tended to have smaller social circles than young people, but the people in these circles tended to be closer to them.

Younger people, on the other hand, tended to have bigger circles that were made up of “peripheral(次要的)others” – people who are not true friends, but just people they know. These people had no influence on the younger interviewees’ happiness.

The results of the study show that the opinion society has about old people being sad and lonely might not be accurate.

“The research shows that older adults’ smaller networks didn’t prevent social satisfaction and happiness. In fact, older adults tend to report better well-being than younger adults,” said Bruine de Bruin.

Many people who want to lose weight often choose to go on a diet. But is this really the best way? With celebrities (名人) speaking about new diets that have helped them become slim (苗条的) in advertisements (广告), more and more people are turning to dieting. Some shops begin to sell diet products such as diet milkshakes, snack bars and even diet pills. However, such popular products and diets are often found to be extremely unhealthy.

Most of these popular diets work by cutting down on a certain nutrient (营养素) from your food intake (摄入量). For example, some diets work by cutting down on carbohydrates (碳水化合物). This means the body must use its fat reserves for energy. This might help you lose weight. However, by cutting a particular food group out of your diet, you are starving your body of a nutrient that it needs, which could leave you feeling weak, tired or even bad-tempered. Besides, these diets are often unsuccessful in the long run.

Generally, one of the most effective ways of losing weight is to cut down on calories. The recommended (推荐的) calorie intake for an adult male is 2,500. If a man consumes more than 2,500 calories each day, then he is likely to gain weight. However, if he consumes less, then he is likely to lose weight.

In fact, proteins, carbohydrates, fats, vitamins and minerals all play an important role in staying healthy, which is why they all should be included in your meals. Of course, some foods can be eaten in moderation (节制) as an occasional snack. For example, a bar of chocolate every once in a while won't cause you any problems.

So, instead of spending money on popular diet pills or special weight loss foods, try to eat healthy balanced meals containing foods from all food groups. So, next time your friends tell you that they are going on a diet, tell them that eating a healthy balanced diet is a much better choice.