The summer before my dad died, we moved house. Up until that point, our family had our own space to spread out. Money was tight, so there was no television set, but we owned a turntable on which my dad's records played constantly. Mostly, it played Bob Dylan. Tracks from The Basement Tapes and Desire became an important part of our new life. My brother and I, aged 8 and 10, climbed trees, built hideaways and learned the words of Clothes Line Saga. We would chant over the, lost in our own joy.

    It was January when my dad left us forever because of the cancer. He was 36 going on 37 then, the same age as Dylan. Afterwards, our laughter disappeared, but we kept on playing the records, which became our only ritual of remembrance. The two men became so intertwined in my head, I struggled to tell them apart.

    Dylan was my dad's gift to me. What child wouldn't be fascinated by songs full of pirates and seasick sailors? How did it feel to have No direction home? Farewell, Angelina became my party-piece. I would sing this at church cheese and wines to the assembled audience. A lot of donations were made.

    Growing up, I remained a fan of the music, but I wasn't obsessed with Dylan until one day in early 1995, my brother bought us both tickets to see him play at Brixton Academy. London felt like a long way to go. But finally seeing Dylan step out onto the stage brought a sudden rush of excitement.

    I have seen Dylan a couple of times since. My brother is not around so much these days. But he was up for a visit recently. We passed a happy evening laughing and drinking, while his son, aged nine, performed his party—piece Subterranean Homesick Blues for us. He sang it word-perfect. And so it goes on: Dylan's music as a gift, passed down the generations.

    Black Friday-the day after Thanksgiving Day in the United States-signals the beginning of the holiday shopping season. Although it's not an official holiday, millions of employers give their employees the day off, and many people use that day to get a jump start on their holiday shopping. A similar day in Canada and the Great Britain is called "Boxing Day".

    Black Friday has become a marketing sensation in recent years. Since 2005, it has been the busiest shopping day of the year. To lure shoppers, retailers（零售商）routinely open their doors as early as 4 am and offer special sales and promotions to the shoppers that arrive early. Some of the special deals offered by stores are only available in limited quantities. That is why some shoppers intend on getting the best deals often camp out in front of stores overnight so that they will be the first in line when the doors open.

    But why Black Friday? Historians believe the name started in Philadelphia in the mid 1960s. Bus drivers and police used "Black Friday" name. In the early 1980s, a more positive explanation of the name began to ciculate. According to this alternative explanation, Black Friday is the day when retailers finally begin to turn a profit for the year. In accounting terms, operating at a loss is called being "in the red" because accountants traditionally used red ink to show negative amounts. Positive amounts were usuallay shown "in black ink". Thus, being in the black is a good thing because it means stores are operating at a profit.

    Recently, for those who are too busy to stop on Black Friday, or who just don't want to fight the crowds, the Monday following Black Friday has become known as Cyber Monday for shoppers can take advantage of the comfort of getting many online deals from their homes.

    When we don't understand each other's language, we can talk with the help of signs.

    A Frenchman was once travelling in England. He could not speak English at all. One day he went into a restaurant and sat down at a table. When the waiter came, he opened his mouth, put his fingers in it, and took out again. He wanted to say. "Bring me something to eat."

    The waiter soon brought him a cup of tea. The man moved his head from side to side. The waiter understood him and took the tea away. In a moment he came with a cup of coffee. But the man again refused it. He shook his head whenever the waiter brought him something to drink, for drinks are not food.

    When the man was going away, another man came in. This man saw the waiter, and he put his hand on his stomach. That was enough. In a few minutes there was a large plate of meat and vegetables on the table in front of him.

    So you see, we cannot understand the language of signs as well as we can understand the language of words.

    In a world with limited land, water and other natural resources (资源), the harm from the traditional business model is on the rise. Actually, the past decades has seen more and more forests disappearing and globe becoming increasingly warm. People now realize that this unhealthy situation must be changed, and that we must be able to develop in sustainable (可持续的) ways. That means growth with low carbon(低碳) or development of sustainable products. In other words, we should keep the earth healthy while using its supply of natural resources.

    Today, sustainable development is a proper trend in many countries. According to a recent study, the global market for low-carbon energy will become three times bigger over the next decades. China, for example, has set its mind on leading that market, hoping to seize chances in the new round of the global energy revolution. It is now trying hard to make full use of wind and solar energy, and is spending a huge amount of money making electric cars and high-speed trains. In addition, we are also seeing great growth in the global markets for sustainable products such as palm oil (棕榈油)， which is produced without cutting down valuable rainforest. In recent years the markets for sustainable products have grown by more than 50%.

    Governments can fully develop the potential of these new markets. First, they can set high targets for reducing carbon emissions (排放) and targets for saving and reusing energy. Besides, stronger arrangement of public resources like forests can also help to speed up the development. Finally, governments can avoid the huge expenses that are taking us in the wrong direction, and redirecting some of those expenses can accelerate the change from traditional model to a sustainable one.

    The major challenge of this century is to find ways to meet the needs of growing population within the limits in this single planet. That is no small task, but it offers abundant new chances for sustainable product industries.

    Smart Kids is a collection of one hundred events scheduled in October. This year, it is experimenting with Pay What You Decide (PWYD). That is, you can decide to pay what you want to or can afford, after you have attended an event. You can pre-book events without paying for a ticket in advance. Here are some of the director's picks.

    Walk on the Wild Side

    Not ticketed, Free

Join storyteller Sarah Law to hear science stories about animals. Along the way you'll meet all sorts of beautiful creatures and discover life cycles and food chains. Best suited to children aged 5-9. Children under 8 must be accompanied by an adult.

    Introduction to Waves

    Pre-book, PWYD

    Subjects range from sound waves to gravity waves, and from waves of light to crashing waves on the ocean. Mike Goldsmith explores the fundamental features shared by all waves in the natural world.

Science in the Field

    Not ticketed, Free

This storytelling night features a scientist sharing his favourite memories of gathering first-hand data on various field trips. Come along for inspiring and informative stories straight from the scientist's mouth. Join Mark Samuels to find out more in this fun-filled workshop.

    Festival Dinner

Pre-book, £25 per person

Whether you want to explore more about food, or just fancy a talk over a meal, join us to mark the first science festival in London. Which foods should you eat to trick your brain into thinking that you are full? Find out more from Tom Crawford.

It's normal to long for the taste of potato chips or a cheese-covered pizza. Even though they're full of calories, eating them occasionally won't do much harm. However, according to the new numbers, young people are becoming more gluttonous. The BBC's Good Food Nation Survey showed that on average, 16 to 20-year-olds ate fast food at least twice a day in the UK. So what's behind this fast food binge (狂热)?

WebMD, an online publisher of news and information of human health and well-being, surveyed nearly 600 teenagers and adults in the United States. They found that the most common reason was our busy lifestyle. More than 92.3 percent of respondents said they were too busy to cook. Many find it challenging to balance work and life, and the convenience of fast food meets their needs. Fast food is readily available in corner stores and vending machines (自动售货机). Remember those instant noodle cups from the supermarket? They're ready in minutes, and you can store them at home for a long time.

But many people think this trend does no good. Sarah Toule, head of health information at World Cancer Research Fund, told the BBC: "It's frightening that people, especially younger generations, are eating so much fast food loaded with fat, sugar and salt, but offers little nutritional value."

She added, "Especially high in calories, fast food leads to unhealthy weight gain — which in turn increases the risk of 11 cancers later in life."

So what is the right thing to do? Toule suggested that young people should prepare meals in advance and learn to include the different food groups in their diets.