Brian Greene, a professor of physics and mathematics at Columbia University, has created an online science education platform. He tries to "build a bridge" with things you know about, and then "bring you across that bridge to the strange place of modern physics."

    Recently I had a chance to ask Greene about wormholes (a hole which some scientists think might exist, connecting parts of space and time that are not usually connected), time travel and other mysteries of the universe. I asked him a million-dollar question: What if I went through a wormhole and prevented my parents from meeting? "Most of us believe that the universe makes sense," Greene said. Although there are several interesting theories about time travel, he added, the laws of physics would probably prevent something so illogical from taking place. The good news is that the time paradox（悖论） is open for future physicists to solve.

    When asked how physics could become more exciting for kids, Greene said that books by Stephen Weinberg, Leonard Susskind, and other physicists, "make it a great time for people who want to learn about big ideas but aren't yet ready, perhaps, to learn math."

    When I pointed out that some students still might find physics boring, Greene said that the key is to teach them about things that are strange. "The basic stuff is important," Greene said. "But I think it's really important to also describe the more modern ideas, things like black holes and the Big Bang. If kids have those ideas in mind, then at least some of them will be excited to learn all the details．"

    Greene has followed Albert Einstein's lead in trying to solve the mysteries of the universe. Now he wants kids to do the same. As Greene said, physics is "not just a matter of solving problems in an exam." It's about experimenting, showing an interest in strange phenomena（现象）-- and having fun!

    I'll never forget the day when Mary came into my office and said, I am too old to learn how to use a computer. I shook my head. Here was a woman who had raised 6 children and who had made great progress in her career telling me that she was too old to learn something new. I told her that I always believed people were never too old to learn.

    Mary followed my advice and did learn how to use the computer. Now, she is retired and leading a very active life volunteering in her community( 社区 ),using her computer skills and helping anyone that needs help.

    When she was in her sixties, one day she called me and said she had played the piano for others all her life, and now she was going to make a CD of her own. My mind flashed back to the day when she told me she was too old to learn. You can imagine my surprise and delight.

    To produce the CD, she had a lot of things to learn. It was not just sitting at the piano and playing. She had to research the songs, learn about copyright(版权),and learn about marketing. It was pretty amazing for someone who once said she was too old to learn. And finally she made it. Now she has her own CD-Mixed Blessings.

    Most of you probably have heard about some people who have gone back to university in their seventies and have also graduated. They are on their way again to charging themselves with a new skill and a new attitude towards life. The point is you are unable to learn anything at any age if you believe you are too old. On the contrary, you can achieve anything at any age if you believe you can.

    Diet pills, diet Coke, diet Pepsi, no-fat diet, vegetable diet… We are surrounded by the word "diet" everywhere we look and listen. We have so easily been attracted by the promise and potential of diet products that we have stopped thinking about what diet products are doing to us. We are paying for products that harm us psychologically and physically.

    Diet products significantly weaken us psychologically. On one level, we are not allowing  our brains to admit that our weight problems lie not in actually losing the weight, but in controlling the consumption of fatty, high-calorie, unhealthy foods. Diet products allow us to jump over the thinking stage and go straight for the scale (秤) instead. All we have to do is to swallow or recognize the word "diet" in food labels.

    On another level, diet products have greater psychological effects. Every time we have a zero-calorie drink, we are telling ourselves without our awareness that we don't have to work to get results. Diet products make people believe that gain comes without pain, and that life can be without resistance and struggle.

    The danger of diet products lies not only in the psychological effects they have on us, but also in the physical harm that they cause. Diet foods can indirectly harm our bodies because consuming them instead of healthy foods means we are preventing our bodies from having basic nutrients. Diet foods and diet pills contain zero calorie only because the diet industry has created chemicals to produce these wonder products. Diet products may not be nutritional, and the chemicals that go into diet products are potentially dangerous.

    Now that we are aware of the effects that diet products have on us, it is time to seriously think about buying them. Losing weight lies in the power of minds, not in the power of chemicals. Once we realize this, we will be much better able to resist diet products, and therefore prevent the psychological and physical harm that comes from using them.

    Saturday, 22 April, 2017

    We are currently on a camp site near Calais, on our way to the UK, and it is pouring with rain. As if gods want to prepare us for the UK at all costs. As if we don't know what rain is… Our ferry to the green isles will leave tomorrow at 10: 30 and despite the rain, I am really looking forward to it.

    It has taken us a while to get here, as we already left EI Chorro on 4 April. After rushing through Spain in two days, however, we came to an inevitable slow-down when we entered France. Inevitable, as France has simply too much to offer for us, so as soon as we crossed the Pyrenees, our driving sequence became something like driving a few kilometres, visiting a castle, driving a few kilometres, taking pictures of a nice church, driving a few kilometres, having a quick peek at a flea market, driving a few kilometres, visiting a museum etc. When we entered Brittany the real sightseeing started, in Vannes, in Lorient, in Brest and then on to Normandy: Le Mont St Michel, Bayeux and finally, finally the D-Day beaches. I always wanted to visit these, for obvious reasons I would say, but my father, realistic as he was, calculated the chances that it would rain a considerable amount of days of a three-week holiday and always decided against it. But a few days ago I finally stepped onto Gold Beach (where the Brits landed) and I was greeted by the Norman sun. A beautiful day.

New movies set holiday eve record

    Chinese moviegoers set a box office (票房) record for the eve of the week—long National Day holiday. By 9:30 p.m. September 30, new movies had brought in 630 million yuan.

    The major movies contributing to the box office record were My People, My Country, The Captain and The Climbers.

    My People, My Country ranked first by bringing in around 270 million yuan. It was made up of seven short stories which were set in historic moments to look back at New China's 70 years of existence. The movie was co-directed by Chen Kaige, Zhang Yibai, Guan Hu, Xue Xiaolu, Xu Zheng, Ning Hao and Wen Muye.

    Another well-received film, The Captain, earned 194 million yuan to occupy second place. Starring actor Zhang Hanyu, the film is based on heroic Sichuan Airlines pilot Liu Chuanjian, who completed one of the most miraculous (奇迹的) emergency landings in China's civil aviation (民航) history.

    Also adapted from real events, The Climbers earned 157 million yuan. With an excellent cast including Zhang Ziyi and Wu Jing, the film is about Chinese mountaineers' climbing to the top of Mount Qomolangma.

    Wu Jing said the film filled a gap in the market, with sports-themed titles quite rare in the world's second-largest movie market.

    Besides the three movies, eight other films will be on during the holiday ending on Oct 7.

    In the mid-1990s, Tom Bissell taught English as a volunteer in Uzbekistan. He left after seven months, physically broken and having lost his mind. A few years later, still attracted to the country, he returned to Uzbekistan to write an article about the disappearance of the Aral Sea.

    His visit, however, ended up involving a lot more than that. Hence this book, Chasing the Sea: Lost Among the Ghosts of Empire in Central Asia, which talks about a road trip from Tashkent to Karakalpakstan, where millions of lives have been destroyed by the slow drying up of the sea. It is the story of an American travelling to a strange land, and of the people he meets on his way: Rustam, his translator, a lovely 24-year-old who picked up his colorful English in California, Oleg and Natasha, his hosts in Tashkent, and a string of foreign aid workers.

    This is a quick look at life in Uzbekistan, made of friendliness and warmth, but also its darker side of society. In Samarkand, Mr Bissell admires the architectural wonders, while on his way to Bukhara he gets a taste of police methods when suspected of drug dealing. In Ferghana, he attends a mountain funeral(葬礼)followed by a strange drinking party. And in Karakalpakstan, he is saddened by the dust storms, diseases and fishing boats stuck miles from the sea.

    Mr Bissell skillfully organizes historical insights and cultural references, making his tale a well-rounded picture of Uzbekistan, seen from Western eyes. His judgment and references are decidedly American, as well as his delicate stomach. As the author explains, this is neither a travel nor a history book, or even a piece of reportage. Whatever it is, the result is a fine and vivid description of the purest of Central Asian traditions.