Most buildings are built to stand up straight, but these look as if they might fall over!

The church tower of Suurhusen

    Built in 1450, the 27-meter-high church tower lies in Suurhusen, Germany. It was built in wet land on foundations of oak tree trunks (树干). When the land was drained (排水) later, the wood broke down, causing one side of the tower to be a little lower than the other. In 1975, the tower became a real hazard and people were not allowed to enter until the foundations were made strong again. The lean (倾斜) of the tower is now about five degrees.

The Leaning Tower of Pisa

    The work of building the tower began in 1173, and was finally completed in 1372. In fact, it began to lean after just a couple of floors were built. And this condition continued in the centuries after its completion. The tower was finally closed to the public in 1990 after people failed to stabilize (使稳固) its foundations. In 2001, it was reopened after engineers removed soil from underneath its raised side. Now it leans just an angle of 3.97 degrees.

Capital Gate of Abu Dhabi

    Completed in 2011, the Capital Gate tower in Abu Dhabi was designed to lean eighteen degrees. The building stands next to the Abu Dhabi National Exhibition Centre and contains, among other things, a fine hotel with wonderful views of the harbour. Also known as the leaning tower of Abu Dhabi, the tower is one of the tallest buildings in the city.

Big Ben of London

    The building leans 0.26 degrees to the northwest. This is mainly caused by the engineering projects that have been carried out in the ground below it since the late 1800s. The tower, which has been continuously open since it was completed in 1858, has nowhere near the lean of the Tower of Pisa and is still completely safe to enter.

    If you want to live longer and lower the risk of heart disease, a move to the mountains may help. Research by scientists in Greece shows that living in the mountains is good for the heart and longevity(长寿). People living at higher altitude(海拔) have lower possibility of dying from heart disease than those closer to sea level, even if they have factors that could increase their risk. "Residence in mountainous areas seems to have a 'protective effect' from heart disease," said Dr Nikos Baibas of the University of Athens. He and his colleagues suspect that the increased exercise from walking up mountainous area gives the heart a good workout and enables it to cope with lower levels of oxygen.

    Researchers studied the health records and death rates of 1,150 Greeks who lived in three villages near Athens over 15 years. One village was 1,000 meters above sea level and the other two were in low-lying areas. Although men and women living in the mountainous village had higher blood pressure rates and other risk factors than people in the other villages, they had a lower rate of death from heart disease and other causes after a fifteen year follow-up." The contrast was more evident among men than among women," Baibas added in a report in the Journal of Epidemiology and Community Health. Heart disease is one of the world's top killers. Smoking, high blood pressure, raised cholesterol levels, being overweight and a family history of the illness increase the possibility of developing the disease.

    The Republic of Vanuatu is an island nation located in the South Pacific Ocean. It was one of the poorest nations in the region. Within the last five years, however, it has become a hot spot for adventure travelers. In 2006 it was voted the happiest place on Earth. The reason is not that Vanuatu are the richest but that Vanuatu has white-sand islands, clear waters, the world's most accessible live volcano, great diving and food that grows faster than it can be picked.

    With a population of about 221,000, Vanuatu has 113 languages, which is a result of 3,000 years of immigration from many Pacific countries. There are three official languages: English, French, and Bislama. Bislama developed from South Pacific English, a simplified language that traders and other foreigners used it to communicate with speakers of the many local languages.

    Most of the islands are mountainous and of volcanic origin. There are several active volcanoes in Vanuatu, including Yasur on the island of Tanna, one of the world's most accessible volcanoes. If you've ever fancied getting close to a volcano, here's your chance.

    Vanuatu Post's Underwater Post Office has quickly become one of the busiest post offices for postcards in the world! Visitors from around the world want to experience the world's first under- water post office. The Post Office is only 50 meters offshore and at just three meters below the surface, very appealing to the young and young at heart. Since opening in 2003, the underwater post office has received about 100,000 visitors. They have posted one of the waterproof（防水的）postcards available in Vanuatu; these cards are collected regularly by one of Vanuatu Post's four trained divers. The underwater branch is manned daily for usually about an hour, longer with demand.

    As advances in auto-technology have placed a huge number of self-driving machines on our roads and sidewalks, a side product has materialized in recent years: robot-babysitting.

    In Phoenix, human attendants will remotely monitor Google's upcoming Waymo robot-taxis, using the cars cameras to evaluate and adapt to passenger or road challenges. State safety regulations typically require that auto-vehicles be accompanied at all times by humans. These professionals' job titles range from "robot handler" to "safety driver," but they have essentially the same responsibilities: monitoring robot behavior for safety and performance, and answering questions about the technology. Broadly speaking, robot-babysitting jobs fall under the umbrella of careers in automation, which include maintenance, engineering, and programming.

    However, some observers note that certain kinds of robot-babysitting –-- the kind that is boring and doesn't require much education –-- can make for thankless work. The safety drivers who sit in self-driving cars have described their roles as" exhausting" and "demanding," and many told me about the constant pressure to stay vigilant at all times. "It's incredibly hard to sit in a chair and stare at a computer without doing anything for eight hours," Ramsey said. "But you do not need a Ph.D. to do it." In March 2018, the field of robot babysitting took a beating when a self-driving Uber in Tempe, Arizona, hit a 49-year old named Elaine Herzberg. Dashcam footage showed that Rafaela Vasquez, the car's safety driver, had not been looking at the road when the accident occurred. Investigators are deciding if Vasquez will be charged with murder.

    According to the McKinsey Global Institute, 10 million to 800 million jobs globally could be lost to automation by 2030. In the long term, it's inevitable that robot-babysitters will go the way of elevator operators and lamplighters. But they'll also birth new robot-related roles." A huge number of jobs will be created as auto-vehicles are loosed into the environment,” Ramsey said. In 2016, Bosch started training students from Schoolcraft College, a community college in Michigan, in auto-vehicle repair: Toyota has trained students in maintenance as well. "We might even see a return to low-level jobs where people come and fuel the car for you," Ramsey said. "Until we can wirelessly charge, someone needs to refuel them.” The hardest-to-automate industries, as it happens, are the ones that require looking after humans: childcare, education, health-care aides. Robot babysitters might feel like they have gained the job of the future. But in fact, real babysitters might be better positioned.

Do you often talk with your parents? Here is some advice on how to talk with them.

Try to start your talk with something fun. This will make talking easier. For example, ask them questions about their day. How's their work? They love this.

Make it clear what you want to tell your parents. If they have an opinion, let them finish it and don't stop their talking. Ask them to do the same for you.

Show them respect (尊敬). Listen to them carefully and look them in the eyes.

Be honest. Honesty builds trust (信任). Life is good when your parents trust you.

If your parents don't understand you, that's OK. It doesn't mean they don't love you. Sometimes you have to explain (解释) the things to them again.

When you finish the talk, thank them for listening. Say something like, "Thanks, that helped." It will let them know this is important to you, and make them want to do it more often.

When it comes to recycling the household waste, people have done it for about two decades. However, there's still some confusion about what can and what can't be recycled. With advances in technology, there are more things that can be recycled.

COFFEE PODS (咖啡荚)

On average, Australians are using more than three million coffee pods per day, and about 1.5 million households have coffee machines. While the pods are disastrous for the environment, they can still be recycled. Nespresso has a free post-back programme and drop-off points run by TerraCycle, so you can take the pods and directly drop off at Nespresso stores.

LIGHT BULBS

Rather than throwing light bulbs into the bin, some councils run specific recycling stations, which allow you to drop off these kinds of items. If you do regularly recycle household glass, remember all glass should be washed and have lids removed.

PIZZA BOXES

Normally pizza boxes don't make it into recycling because they're covered in grease (油脂) and leftover bits of cheese. When a pizza box is too greasy, it won't be taken to a recycling processing plant. If possible, remove as much of the leftovers as you can before recycling. If the pizza box can't be recycled, tear off the lid which can still be recycled.

HOUSEHOLD BATTERIES

Household batteries can also be recycled. Batteries that do end up in landfills can cause a serious problem to the environment as they can release poisonous chemicals into the soil which are harmful to both humans and animals. Button-cell batteries, which are used in hearing aids and watches, can also be recycled.