A day at the shops can help you live longer, and surprisingly, the benefits are actually greater for men, says a study group from Taiwan. The study even suggests that shopping regularly is better than going to the gym. Seeing friends and just people-watching can stave off loneliness and improve psychological health, suggests the study. It looked at almost 1850 people aged 65 and over living alone at home in Taiwan, who were asked how often they went shopping. They found those who shopped daily lived longer than those who shopped less, with thinking of people’s physical or other health problems. By comparing with those who didn’t often go out to the shops had the best life record, with a 28% cut in their chances of dying, while older women saw a bit fewer benefits with a 23% cut in dying.   The researchers said, “An elder who shops less for food would be at risk of poorer diet to keep healthy. This makes a bad cycle. Shopping less causes poor health and poor health causes less shopping. ” But the study added, “In shopping situations, communicating with, or watching others can provide social and mental benefits. ” “Compared with other types of spare-time physical activity, like exercise, which usually needs motivation and sometimes professional instruction, shopping is easier to keep on.”

Artificial intelligence (AI) is technology that lets machines do things that need “thinking.” It is a hard term to define (下定义) because AI isn’t actually one thing. Rather it’s a group of technologies that help machines get, understand and use information to perform tasks. The range of technologies is one of the reasons people use so many different terms to describe AI. In addition to artificial intelligence, terms like machine learning, cognitive computing and deep learning are common.

No matter which term is used, recent developments have received a lot of public attention. Some have welcomed the technology because of things that AI makes possible. For example, AI will have a big effect on areas like medicine and engineering. But the public attention has also produced a lot of fear and caution. In particular, many are concerned about the effects AI could have on people’s jobs.

According to a recent study, nearly five percent of jobs will disappear because of AI. High on the list are jobs in the producing and mining industries, where systems powered by AI are already performing tasks that people used to do, such as assembling (组装) cars, digging tunnels and loading materials. In the future, self-driving cars and trucks that depend on AI will also steal jobs for drivers. Moreover, AI systems will do many tasks now performed by legal assistants and accountants.

On the other hand, AI will also create many new jobs. More people will be needed to write software for AI systems as well as to set up and operate them. Meanwhile, jobs that require emotional intelligence, excellent communication skills and interaction with people will not be replaced by Al. These include jobs in fields like teaching, nursing, hairdressing and personal training.

The human body has its limits（极限）. There are many things that our bodies cannot do. 【小题1】 They surprise us. Here are some examples.

How long can you hold your breath underwater?

【小题2】 If water goes into your lungs, you can die. With a little training, a person can hold his breath for two to three minutes. This is already quite impressive. Aleix Segura Vendrell is a diver（潜水员）from Spain. 【小题3】

How much can a buman lift?

Usually, a healthy person can lift 50 to 60 kilograms. 【小题4】 Lifting heavy things can tear our muscles（拉伤肌肉）. But athletes can lift a lot more. Andy Bolton is a British weight lifter. He lifted 457. 5 kilograms from the floor to his height.

【小题5】

What happens when people don’t get enough sleep? They become angry easily. Sometimes they even can’t think very clearly. According to Huffpost, Randy Gardner from the US holds the record for the longest time spent awake. He didn’t sleep for 264 hours. That’s about 11 days.