Houses fall down. Trees fall over. Large holes form in the ground. Could Alaska be sinking? That's what some villagers in Alaska have been asking themselves recently and scientists think they know why. Warmer temperatures may be causing Alaska's frozen ground to thaw (解冻).

    About 85 percent of Alaska's land surface has permafrost (永久冻结带). Permafrost supports the ground above it—including trees, houses, and roads. But why is the permafrost thawing?

    Some scientists say that human-caused pollution is leading to global warming. And most scientists agree that Alaska has been getting warmer. They say that the warmer temperature is causing permafrost to thaw in some areas. The thawing permafrost can cause problems for people, plants, and animals.

    The collapsing (倒塌) is a problem in the villages in Alaska which are built on permafrost, and some of them may have to move to safer ground, where there is no permafrost.

    The Alaskan town of Glennallen saw its old post office collapse. And, according to James Walters, a permafrost expert at the University of Northern Iowa, house-moving companies have been very busy.

    “Melting permafrost can also destroy trees and forests,” Walters said. “When holes in the ground form, trees fall into them and die. This could turn a forest into a swamp (沼泽), and animals which need the forests will have to move elsewhere.”

    “The melting could cause severe problems.” Walters says, “This could take hundreds of years, but in the end Alaska will look quite different from what it looks like now.”

    One Sunday, my son asked me if he could ride up to his elementary school on his bike and meet his friend. He wanted both of them to ride back to our house so they could play video games and jump on the trampoline (蹦床). I have to admit, part of me wanted to say no. We could go to pick him up or his parents could bring him over here. I thought. But my son is eleven years old now. And after all, I do let him ride his bike to school. But I also drive my daughter to school and I can see him on the way, making sure he is getting there safely.

    My husband thinks I am overprotective. I don't dare to let my children walk anywhere without one of us going along. As you go out of our neighborhood, there is a shopping center across the street. My son always asks if he can ride his bike or walk over to the drugstore by himself. But crossing that street is just too dangerous. The cars fly around the comer like they're driving in a car race. What if he gets hurt? What if some teenager bullies are hanging out in the parking lot? I want so much to give my children the freedom that I enjoyed having when I was growing up but I hesitate to do so, because there are dangers around every comer. Too many kidnap, too many robberies and so on.

    I honestly don't think my mom worried about such things when her children were young. Growing lip in the 1970s was indeed very different. I never wore a helmet (头盔) when I rode a bike. We were all over the neighborhood, on our bikes and on foot, coming home for dinner and then-back out again until dark. We rode in the back of the truck and didn't wear seat belts. I walked to and from school every day.

    THE WEEK IN READING: THE BEST NEW BOOK RELEASES FOR APRIL, 2017

    Balancing work and school is not an easy task for me. My first term in college has come and gone and I've had to balance a job there, too. I want to cut one loose. Honestly, many times I thought I wanted to drop out of school and just do my job because I needed the money. For a long while I made myself believe that school was getting in the way of my job and money. Not only was I trying to do work and school, but also I was trying to have a social life. Many times I thought that there were not enough hours in the day but I wasn't managing my time right. Hanging out with friends may have been wonderful but it wasn't putting money in my pocket or knowledge in my brain. Friends would have to wait. I was back on the see-saw (跷跷板) of balancing work and school.

    Scheduling and planning became the key to my success. Setting deadlines and meeting them were important to my college experience. Planning was going well and I felt ready to try and throw a social life back there. I tried to make plans with friends that didn't conflict with my deadlines. That was actually harder than I thought. So once again my social life had to be put on hold (搁置). My friends were very understanding and encouraged me to do my work. The extra motivation really proved helpful in the end. Some friends would joke that I was all work and no play but sometimes that's what has to happen to get work done.

    As the last term came to an end I can say I learned a lot about college life. Planning is necessary for organization. Drawing up a list of all things I had to do at the beginning of the week and actually completing them made me feel good. Not only have I learned something new about organization, but also I acquired a new tool that I can take everywhere with me and use effectively.

    I first met Paul Newman in 1968, when George Roy Hill, the director of Butch Cassidy and the Sundance Kid, introduced us in New York City. When the studio didn't want me for the film - it wanted somebody as well known as Paul — he stood up for me. I don't know how many people would have done that; they would have listened to their agents or the studio powers.

    The friendship that grew out of the experience of making that film and The Sting four years later had its root in the fact that although there was an age difference, we both came from a tradition of theater and live TV. We were respectful of craft(技艺) and focused on digging into the characters we were going to play. Both of us had the qualities and virtues that are typical of American actors: humorous, aggressive, and making fun of each other — but always with an underlying affection. Those were also at the core(核心) of our relationship off the screen.

    We shared the brief that if you're fortunate enough to have success, you should put something back — he with his Newman's Own food and his Hole in the Wall camps for kids who are seriously ill, and me with Sundance and the institute and the festival. Paul and I didn't see each other all that regularly, but sharing that brought us together. We supported each other financially and by showing up at events.

    I last saw him a few months ago. He'd been in and out of the hospital. He and I both knew what the deal was, and we didn't talk about it. Ours was a relationship that didn't need a lot of words.

Amid the coronavirus outbreak, the U. S. Department of Homeland Security recommends having at least a two - week supply of water and food.

Potatoes

Shelf life: 2 to 5 weeks if stored in a cool, dry, dark place

Yukon Gold, red, and fingerling potatoes will last from two to three weeks. Larger white potatoes can last for three to five weeks. Sweet potatoes have about the same shelf life. Don't store them next to onions, however. The two might go together well in cooking, but raw, each gives off gases and moisture that might cause the other to spoil faster.

Tea

※Shelf life: 6 to 12 months past "sell - by" date

Dried tea leaves, whether loose (in a sealed container) or in teabags (in an unopened box) can easily last a year or more if they're not subjected to damp or humidity. However, the tea does tend to lose flavor over time.

Peanuts

● Shelf life: 1 to 2 months

Peanuts in their shell, especially when kept cool and dry, are perfectly happy in the cupboard for as long as two months.

Canned fruits and vegetables

● Shelf life: 1 to 2 years past "sell – by" date

Canning is an extremely efficient means of preserving food. Generally speaking, if canned foods aren't subjected to extreme heat, their contents should stay good for two years or more. Be aware, however, of dented cans or those with swollen tops, which may indicate the presence of bacteria inside.