For those who are tired doing the laundry, Samsung has found an answer: a washing machine that can tell you when your laundry is done via a smartphone app(application).

    Strange though it may seem — “my wife already does that” was a common response among attendees viewing the device when it was introduced at the Consumer Electronics Show (CES) this week — Samsung is just one of many appliance makers racing to install (安装) a large number of internet-connected features in machines in an effort to make them “smart”.

    Last year, it was a refrigerator that tweeted. This year, it's Wi-Fi-enabled laundry machines and fridges that can tell you when your groceries are going bad.

    The washers and dryers, available starting in the spring, connect to any smartphone through a downloadable application. The phone can then be used as a remote control, so the machines can be turned on and off while their owners are at work or on the bus.

    Samsung says it's not just something new — the app connection actually has some practical uses.

     “If you started to dry clothes in the morning and forgot to take them out, you can go to your phone and restart your dryer for the time when come home, so your clothes are refreshed and ready to go,” said spokesperson Amy Schmidt.

    The company also says that with electricity rate(电价)varying depending on the time of day, more control over when the machines are used can help save money.

    Perhaps, but what they will probably really accomplish is what all good technologies do —enable laziness. Rather than getting up to check on whether the laundry is done, users will instead monitor it on their phones while watching TV.

    Bees and other pollinators（传粉者）  use smells to track down fresh flowers. Air pollutants can weaken those scents（气味）.  Scientists had worried this might make it harder for some pollinators to find a meal.

    Many animals help pollinate plants. Species that do this include bees, butterflies, etc. But for many reasons, the pollinators available to help plants in this way are decreasing. Scientists think a loss of habitat（栖息地）can be one factor. Diseases and exposure to poisonous chemicals also count.

    Jose Fuentes points to air pollution as another possible factor. He's an atmospheric scientist at Pennsylvania State University. In an earlier study, he showed some air pollutants could weaken or destroy scents emitted(发出)by flowers.

    Searching for a meal leaves pollinators out in the open and at risk of becoming other animal's lunch. And any time spent hunting food is time away from their duties back home, like protecting a hive（蜂巢）or nest, explains T'ai Roulston. He's an insect biologist at Virginia University. Roulston worked with Fuentes on the new study.

    In the study, the researchers focused on five kinds of representative scent molecules(分子)plants emit. One molecule they looked at, for example, is called beta-myrcene. Many flowers give off this chemical into the air.  Normally, this gas can travel some 800 meters from its flower source. But in polluted air, this same molecule could travel only half as far.

    Worse still, air pollution might do more than just weaken scent plumes（气味烟云）．Chemical reactions between air pollutants and plumes may transform the flowers' smells, creating new scents. And these scents may be unrecognizable to pollinators.

    That's certainly Fuentes' concern.  So, he says his next research project will look at how insects handle any new flower scent. "It's possible that some insects will change ways to detect and use these new molecules to find food," he says.

    Many animals recognize their food because they see it. So do humans. When you see an apple or a piece of chocolate you know that these are things you can eat. You can also use other senses when you choose your food. You may like it because if smells good or because it tastes good. You may dislike sonic types of food because they do not look, smell or taste very nice. Different animals use different senses to find and choose their food. A few animals depend on only one or their senses, while most animals use more than one sense.

    Although there are many different types of food, some animals spend their lives eating only one type. The giant panda eats only one particular type of bamboo. Other animals eat only one type of food even when given the choice. A kind of white butterfly will stay on the leaves of a cabbage, even though there are plenty of other vegetables in the garden. However, most animals have a more varied diet. The bear eats fruits and fish. The fox eats small animals, birds and fruits. The diet of these animals will be different depending on the season.

Humans have a very varied（广泛的）diet. We often eat food because we like it and not because it is good for us. In countries such as France and Britain, people eat foods with too much sugar. This makes them overweight, which is bad for their health. Eating too much red meat and animal products, such as butter, can also be bad for the health. Choosing the right food, therefore, has become an area of study in modern life.

    My dad loved pennies, especially those with the elegant stalk of wheat curving around each side of the ONE CENT on the back. Those were the pennies he grew up with during the Depression (大萧条).

    As a kid, I would go for walks with Dad, spying coins along the way—a penny here, a dime (一角硬币) there. Whenever I picked up a penny, he'd ask, "Is it a wheat?" It always thrilled him when we found one of those special coins produced between 1909 and 1958, the year of my birth.

    One gray Sunday morning in winter, not long after my father's death in 2002, I was walking down Fifth Avenue, feeling bereft. I found myself in front of the church where Dad once worked. I was warmly shown in and led to a seat. Hearing Dad's favorite "A Mighty Fortress Is Our God", I burst into tears. We'd sung that at his funeral. After the service, I shook the pastor's hand and stepped onto the sidewalk—and there was a penny. I bent to pick it up, turned it over, and sure enough, it was a wheat. A 1944, a year my father was serving on a ship in the South Pacific.

    That started it. Suddenly wheat pennies began turning up on the sidewalks of New York everywhere. I got most of the important years: his birth year, my mom's birth year, the year he graduated from college, the year he met my mom, the year they got married, the year my sister was born. But alas, no 1958 wheat penny—my year, the last year they were made.

    The next Sunday, after the service, I was walking up Fifth Avenue and spotted a penny in the middle of a crossing. Oh, no, it was a busy street; cabs were speeding by—should I risk it? I just had to get it.

    A wheat! But the penny was worn, and I couldn't read the date. On arriving home, I took out my glasses and took it to the light. There was my birthday!

    I found 21 wheat pennies on the streets of Manhattan in the year after my father died, and I don't think that's a coincidence.

    On the very first day, God created the cow and said to him, "As a cow, you must go to the field, working under the sun all day long! And I will give you 40 years to live." The cow objected, "What? You want me to live such a tough life for 40 years? Let me have 20 years, and I'll give the rest back to you." So God agreed.

    On the second day, God created the dog and said, "You'll be man's best friend, guarding his house and eating his leftovers. I'll give you a life span of 30 years." The dog shook his head. "Eating leftovers for 30 years? No way! I'll give half back to you!" So God agreed.

    Then, God created the monkey, saying, "Your job is to entertain people. You've got to do monkey tricks and make them laugh. And you'll live 20 years."" Do monkey tricks to make them laugh? 10 years will do." the monkey said. So God agreed.

    Finally, God created the man. "You will be the man. All you need to do is to sleep, eat, and play, simply enjoying your life. And I'll give you 20 years to live." Thinking for a while, the man replied, "I can be the man, but I want to take all the years that the cow, the dog and the monkey didn't want." So God agreed.

    Since then, man eats, sleeps and plays in the first 2 decades, marries and spends the next 2 decades like a cow, working very hard to support his family. Then when he has children, he lives 15 years like a dog, taking care of the house and eating whatever is given to him. And when he is old, he retires and lives 10 years like a monkey, doing tricks to amuse his grandchildren.

    Deisha walked up and down as she waited backstage. This would be her most important piano performance yet. At ten years old, she was the youngest performer in the recital (音乐演奏会). She had practiced playing her song more than 30 times that week. When she closed her eyes at night the music played over and over again in her head.

    Now that the day had arrived. Deisha was not sure she was ready. She smoothed her hair and picked a piece of lint (绒毛) from the new dress that her mother had bought for her. She noticed that her hands were shaking. How could she play the notes of the song if her hands were shaking? She tried to concentrate on steadying (稳住) them, but they play only shook more.

    Deisha's piano teacher, Ms Neal, walked up to speak to her. "I have something for you." she said, putting a smooth black stone into Deisha's hand. "It's a special stone. There's no other one like it in the world. You've practiced so much: you don't need anything else."

    The stage lights reflected off the rock. "Thank you," Deisha said.

    When Deisha's name was called, she rubbed the stone, stepped onto the stage, and played better than ever.

    After her performance, she noticed that Ms Neal had a whole bag of black stones. "Why did you say this one was so special?" she asked. The teacher responded, "Because, like your talent, it belongs only to you."