When I was young, I had an old neighbor named Dr. Gibbs. He didn't look like any doctor I'd ever known. He never shouted at us for playing in his yard. I remembered him as a neighbor who was nicer than anyone else in the neighborhood. When Dr. Gibbs was happy, he was planting trees. And his life's goal was to make it a forest.

    Dr. Gibbs had some interesting theories about planting. He talked about trees that weren't watered would grow deep roots in search of water. So he never watered his trees. He planted an oak (橡树) and, instead of watering it every morning, he beat it with the rolled-up newspaper. I asked him why he did that, and he said it was to get the tree's attention.

    Dr. Gibbs died a couple of years. Every now and then, I walk by his house and look at the trees that he planted twenty-five years ago. They're very strong now.

    I planted a couple of trees a few years later. I watered them regularly and took good care of them. Whenever a cold wind blows, they shake their leaves and branches.

    The funny thing about those trees of Dr. Gibbs was that difficulty seemed to help them in ways comfort and ease never could.

    Many Americans spend more time in cars these days than in the kitchen. But as lives grow busier—and waistlines grow larger—a number of health experts are calling for Americans to reduce their risk of cancer and other diseases by cooking at home more and eating out less.

    “When dining out, people are likely to gravitate towards all the wrong thing,” says Rachel Brandeis of the American Dietetic Association. “People take in 50% more fat and sodium when they eat out than when they cook at home. And they often miss out on fruits, vegetables and other vitamin-rich ‘powerhouse foods' that may reduce the risk of cancer.”

    Nutritionists know it's not easy to break old habits. Many people say they hardly have time to exercise, let alone fix dinner.

    Brandeis says her secret is organization. She cooks six nights a week, even though she and her husband both work. She spends 20 minutes thinking about a week's worth of menus and writing a list. She shops just once a week. Brandeis says she chooses easy cooking methods, too. Since she is not quite good at cooking.

    The American Institute for Cancer Research has produced a guide filled with tips like “Homemade for Health”. Melanie Polk, the institute's director of nutrition education, says cooking at home has many advantages. It teaches children about nutrition as well as the importance of sharing housework.

    The 39-year-old homemaker Kirstin Kristinus of Washington, D.C. says cooking at home brings her family together. She also tries to reduce her family's cancer risk by preparing every meal with many different kinds of food.

    “The only way to know that you are getting all the good things is to expose yourself to a wide variety of food,” says Steven Shiff, a doctor in New Jersey. “If you eat out at a restaurant, it's a lot easier to choose unhealthful things.”

    However, “families don't have to give up restaurants,” Shiff says. “It is possible to eat healthfully if you eat outside the home. But it takes probably the same sort of planning that you would have to do to prepare meals at home.”

    Alibaba, Bank of China and Huawei—these are the dream employers for Chinese students, according to a new survey.

    “The survey of more than 55,000 students, conducted by the research firm Universum, has found that roughly a quarter want to work for an international company, while only 9％ want to work for a start-up. Five percent want to start their own business.”

    The students said that work-1ife balance was the most important career goal, followed by job stability. When it comes to desirable companies, Bank of China has been named the top choice by business students for seven consecutive years, and the gigantic state-owned firm shows no signs of giving up its lead.

    William Wu, the China country manager for Universum, said that banking remains an attractive industry for young Chinese. “China's government is now emphasizing the revolution of the finance industry, which leaves the younger generation with the impression that although banking is a traditional industry, there are still a lot of development opportunities.” Wu said.

    E-commerce giant Alibaba (BABA, Tech30) improved six places from 2014, ranking second among business students. Alibaba's rise shouldn't come as much of a surprise—the company held a record-breaking $25 billion IPO in September.

    Among engineering students, Alibaba was once again a bridesmaid. Instead, Huawei—a telecoms infrastructure firm that now makes consumer products-took the top spot.

    “Both of these companies are pioneers in terms of local companies going international.” said Wu. “It shows that… an international development strategy has a positive influence among Chinese young talents.” Tech companies ruled the rankings for humanities students, with Alibaba—which was ninth in 2014 —landing at the top. Last year, Apple was the Number l choice of Chinese students.

    A group of scientists is gathering today in the U. K. to discuss a thick piece of ice that's cracking in Antarctica, which is of the size of Delaware.

    The ice shelf is called Larsen C, and it now has a 90-mile crack running through it. The big rift (裂缝) is slicing the ice shelf from top to bottom. But this is not just another sad climate change story. It's more complicated. "A lot of things are going on deep inside the ice," says Adrian Luckman, a glaciologist.

    Luckman says climate change is certainly influencing this region. Larsen C used to have two neighbors to the north, Larsen A and Larsen B. As the air and water warmed, those ice shelves started melting and then disappeared in 1995 and 2002. But the crack in Larsen C seems to have happened on its own, for different reasons.

    Larsen C has many cracks. All ice shelves do. This particular crack has been around since at least the 1960s. The unusual part is that in 2014, this crack — and only this crack — started growing quickly. Why?

    "Well, that is a little bit of a mystery and that's why it drew itself to our attention," says Luckman. One puzzling aspect is how it managed to cut through areas of softer ice that bind (连接) the ice from neighboring glaciers into one giant sheet. Starting in 2014, that soft ice did very little to slow down this rift.

    Scientists are split on how important this crack is for the stability of the whole ice shelf. Some say if this giant section breaks off, it won't make a difference. Others disagree.

    "Ice shelves are the gates of Antarctica in a way, and the gatekeepers of Antarctica. The ice shelves are already floating, so if they fall apart it does not immediately affect sea levels. It's what they hold back -water from all the inland glaciers — that could be problematic. If all the water packed in those glaciers made their way to the sea, it could significantly raise global sea levels," says Ala Khazendar, a geophysicist.

As far as we know batteries are playing an important role in our life. We couldn't live without batteries. Why so? Batteries provide power for anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri (MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.

" To provide enough power, we need certain methods with high energy density (密度)", said Jae Kwon, assistant professor of electrical and computer engineering at MU." The radioisotope(放射性同位素) battery can provide power density that is much higher than chemical batteries."

Kwo n and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro/ nanoelectromechanreal systems(M/NEMS). Although nuclear batteries can cause concerns, Kwon said, they are safe.

" People bear the word‘ nuclear' and think of something very dangerous," he said," However, nuclear power sources have already been safely powering a variety of devices, such as pace- makers, space satellites and underwater systems."

His new idea is not only in the battery's size, but also in its semiconductor(半导体). Kwon's battery uses a liquid semiconductor rather than a solid semiconductor.

" The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure(晶体结构) of the solid semiconductor, Kwo n said," By using a liquid semiconductor, we believe we can minimize that problem."

Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwo n is working to build and test the battery. In the future, they hope to increase the battery's power, shrink its size and try with various other materials. Kwo n said that battery could be thinner than the thickness of human hair.

What do you do with your old clothes? You might throw them away, or if you want to be more environmentally friendly, you could sell or donate them. No matter what you choose, it's always been your responsibility to deal with them. However, a new California law could shift this responsibility to clothing producers.

This pioneering law, called the Responsible Textile Recovery Act, is targeted to set requirements for producers of clothing, towels and bedding. It requires them to develop and fund a statewide program for reusing, repairing and recycling their products. The law could help address the long-standing pollution caused by the textile (纺织) and fashion industries, noted The Guardian.

Since 1960, the amount of textile waste in the US has grown nearly tenfold, reaching over 17 million tons in 2018, according to the US Environmental Protection Agency. A shocking 85 percent of textiles end up in landfills where they send out harmful gases and chemicals into the environment. As a major polluter, the fashion industry accounts for about 10 percent of global carbon emissions (排放), more than international flights and shipping combined, according to the United Nations. The rise of "fast fashion", which produces cheap, low-quality clothing meant to be worn only a few times, has significantly worsened this environmental crisis.

The serious pollution drove Democratic state senator Josh Newman, who drafted (起草) the Responsible Textile Recovery Act, into action. He communicated with all sectors of the textile industry to prevent opposition.

Some worry the law could make shopping more expensive and impact small and medium-sized brands. However, Newman said people shouldn't notice any price increases, estimating it would cost producers less than 10 cents (0.7 yuan) per item.

The program is expected to begin as early as 2028 in the hope of making the industry more sustainable (可持续的). It could also open new opportunities for green production and consumption while creating more than 1,000 green jobs.