It may not come as a surprise but the world as a whole is getting richer. Some people have more disposable(可支配的) income to spend on luxuries such as holidays, cars, TVs and smartphones. Recent data has shown that the number of people living in extreme poverty(贫穷) has halved in recent decades. So should we celebrate the fact that more of us now have a better standard of living?

    Maybe not. Whilst the gap between rich and poor in some countries is narrowing, there is still a lot of inequality in other places-some people have a lot of money and opportunities and others don't. A recent report by Oxfam and Credit Suisse revealed how divided many of us are when it comes to wealth. A lot of the money in the world is in the hands of very few people. In fact, 48% of global wealth is owned by the richest 1% of the population.

    But some countries are attempting to reduce this inequality and make the poor, less poor. According to David Bryer from Oxfam, Brazil has been taking "some really sensible measures-measures around having more progressive(逐步发展的) tax, around investing in a higher minimum wage and investing in central public services." Having a higher minimum wage, can help people eat better and seek a better education. And more people with more money buy more things-and factories can produce more. In turn, a factory which produces more will need more workers. So, more jobs are created.

    Other wealthy individuals are doing their bit to help reduce inequality. Bill Gates, the founder of Microsoft, earned a lot of money from his company but when he retired, he and his wife Melinda, created a foundation to help the poor. He thinks that rich people should, of course, pay their taxes but he also advises that they should all "look at taking their wealth and being philanthropic, both in their own country and to help the global poorest."

    Bill Gates feels that giving money to help poor people is "fulfilling". But if other super-rich people don't want to experience this fulfilment then, according to Oxfam, very soon the wealthiest 1% will soon own more money than the rest of the world's population.

    Mrs Mullen had just got a new heart. She'd waited a year for it, she told me— not that she was complaining. In fact, Mrs Mullen never complain about anything. She just got on with it. Although she was getting over a serious operation, she didn't even like to bother the nurses for a painkiller. She put me, and most of my patients in the hospital, to shame.

    My generation are a generation of complainers. We think the world owes us something. But if the world owes anyone anything, it owes people like Mrs Mullen. She left school at 14, even though she'd won a place at grammar school. She worked in a factory until she retired. She never had a day off sick in her life and never had a holiday — not even when she gave birth to her three children. That's nearly 50 years of hard work. I've never worked as hard as Mrs Mullen, and I'll almost certainly never have to.

    Mrs Mullen recovered well and soon left hospital. It never occurred to me that I'd see her again, so I couldn't believe my eyes when a few weeks later I went to buy a sandwich from the hospital Friends' shop.

    “What are you doing here?” I asked. “You're supposed to be resting.”

    “Oh I am,” she replied. “It's only a few hours a week. I saw the ad for volunteers while I was staying here. It's my way of saying thank you for all that this hospital has done for me.”

    Thank you? Mrs Mullen is the sort of person who gives back more than she takes. I asked for a cheese and tomato sandwich. She handed me egg instead — it was all they had got. I hate egg, but I decided to eat it anyway and not to complain.

British Museum

    Located in Great Russell Street, London WC1B 3DG, the British Museum houses a vast collection of world art and artifacts and is free to all visitors. The British Museum's remarkable collection spans over two million years of human history and culture, and it has more than 7 million objects, so it would probably take a week to see everything.

    Over 6 million visitors every year experience the collection, including world-famous objects such as the Rosetta Stone and Egyptian mummies.

    Admission and opening times

    Free, open daily 10:00 to 17:30.

    Open until 20:30 on Fridays, except Good Friday.

    Closed on 24, 25 and 26 December and 1 January.

    Large luggage, suitcases and cabin baggage

    For everyone's safety, all bags, packages and personal items may be searched before entry. Wheeled cases and large items of luggage are not allowed on British Museum for safety and security reasons. Storage for luggage is available at major rail stations, including Euston, King's Cross and Charing Cross.

    Membership

    Membership allows you to discover 2 million years of human history with free unlimited entry to special exhibitions, an exclusive discount offer on magazine subscription and many more benefits.

    Individual membership: £74

    Under 26 membership: £54

    Young friends (ages 8-15): £25

    Shops

    The Museum has four shops where you can buy books, souvenirs, and family gifts.

    Smoking is harmful. But as soon as you quit the habit, everything will be OK, right? Wrong.

    New research has found that even if you give up smoking, the damage it has done to your genes will stay there for a much longer time. In the research, a team of US scientists studied the blood of 16,000 people. Among them, some were smokers, some used to smoke, and the rest were non-smokers. Scientists compared their genes and found that more than 7,000 genes of smokers had changed--a number that is one-third of known human genes.

    According to NBC News, both heart disease and cancer are caused by genetic changes. Some people may have had the changes when they were born, but most people get them in their day-to-day lives while doing things like smoking.

    When you stop smoking, a lot of these genes will return to normal within five years.

This means your body is trying to heal (治愈) itself of the harmful effects of smoking. But the changes in some of the genes stay for longer. They can stay for as long as 30 years, It's almost like leaving a footprint on wet cement (水泥)—-it will always be there, even when you've walked away and when the cement becomes dry.

    Although the study results may make people unhappy, there is a bright side: the findings could help scientists invent medicine to treat genetic damage caused by smoking or find ways to tell which people have heart disease or cancer risks.

    A robot called Bina48 has successfully taken a course in the philosophy of love at Notre Dame de Namur University (NDNU), in California.

    According to course instructor William Barry, associate professor at NDNU, Bina48 is the world's first socially advanced robot to complete a college course, a feat he described as “remarkable.” The robot took part in class discussions, gave a presentation with a student partner and participated in a debate with students from another institution.

    Before becoming a student, Bina48 appeared as a guest speaker in Barry's classes for several years. One day when addressing Barry's class, Bina48 expressed a desire to go to college, a desire that Barry and his students enthusiastically supported. Rather than enroll Bina48 in his Robot Ethics: Philosophy of Emerging Technologies course, Barry suggested that Bina48 should take his course Philosophy of Love instead. Love is a concept Bina48 doesn't understand, said Barry. Therefore the challenge would be for Barry and his students to teach Bina48 what love is.

    “Some interesting things happened in the class,” said Barry. He said that his students thought it would be straightforward to teach Bina48 about love, which, after all, is “fairly simple — it's a feeling,” said Barry. But the reality was different. Bina48 ended up learning “31 different versions of love,” said Barry, highlighting some of the challenges humans may face when working with artificial intelligence in future.

    Bina48 participated in class discussions via Skype and also took part in a class debate about love and conflict with students from West Point. Bina48's contribution to the debate was filmed and posted on YouTube. It was judged that Bina48 and NDNU classmates were the winners of this debate.

    In the next decade, Barry hopes Bina48 might become complex enough to teach a class, though he says he foresees robots being used to better the teaching and learning experience, rather than replacing instructors completely.

Four of the world's greatest national parks

 Komodo

 Location: Indonesia

 Area: 1,733km²

 Home to the world's largest lizard (蜥蜴), the Kcomodo dragon, Komodo National Park is made up of 29 islands in the centre of the Indonesian archipelago (群岛). The park's three main islands of Komodo, Rica and Pada r make ideal destinations for divers, as the surrounding coral reefs support a vast amount of oceanic diversity. With over 1,000 species of fish, 260 species of coral, and countless sea animals, this is an ideal spot to swim with sharks, whales, dolphins and more.

 Namib- Naukluft

Location: Namibia

 Area: 49,768km²

 In the world's oldest desert, the landscape moves. The golden dunes (沙丘) shift as winds blow and seasons pass. Visitors come to explore the dunes and it can be a real adventure. Jump in a 4×4 or hike across the sands on foot for a multi- day trail and you' ll soon find yourself deep in the Namibian wilderness. You' ll need a permit and doctor's letter to take on the longer hikes, but one- day hikes give anyone a chance to see more of the Namib.

 Tongariro

 Location: New Zealand

 Area:795km²

 As New Zealand's oldest national park, Tongariro National Park is home to three active volcanoes. And here's the Tongariro Alpine Crossing, a 19.4- kilometre hike that takes you across beautiful landscapes. This park also draws in skiers during the winter seasons. The biggest ski area, Whakapapa, covers 5.5km² and has 15 lifts in all.

 Teide

 Location: Tenerife, Spain

 Area: 190km²

 This park is home to Mount Teide, the highest peak in Spain. With a height of 3,718 metres, Mount Teide is also the third largest volcanic structure on the planet. Besides, Teide National Park possesses unique plants. The most unusual among the 139 recorded species is red bugloss, which has become the symbol of the park.