As the new semester begins, millions of college students across the country are trying hard to remember how best to write a paper or, more likely, how best to delay that paper.

    Procrastination is the thief of time and a lot of students suffer form it. They can spend whole days in the library doing nothing but staring into space, eating snacks, surfing the Internet, watching videos and looking at other students sitting around them, who, most likely are doing nothing either.

    Paralyzed (使失去活力) by their habit to procrastinate, they write micro blogs about their fears, asking their online friends if they sometimes have the same issue. But this does nothing to break the spell (魔咒).

    According to a recent report, 95 percent of us procrastinate at some point and 20 percent of the world's population are always procrastinating. The figures are disappointing. Procrastinators are less wealthy, less healthy and less happy than those who don't delay. Procrastinators like to find excuses to justify their behavior, but BBC columnist Rowan Pelling says they are all wrong.

    Many procrastinators tell themselves they are perfectionists who work best under pressure. Pelling says this is non sense, as work done at the last minute is more likely to have mistakes than work done on time. The behavior of procrastinators often makes them feel ashamed, inconveniences others and annoys loved ones.

    Pelling also points out that procrastination feels particularly delinquent（过失的） in a society that thinks of speedy action as admirable, and, at times, even as a moral good.

    Fortunately, social scientists have thrown their weight behind efforts to understand this behavioral mistake and offer strategies to control it. Piers Steel, a Canadian social scientist and author of The Procrastination Equation, believes human is “designed” to procrastinate. Nevertheless, he suggests a couple of good ways to get through the task at hand.

    Most birds produce short, simple calls, but songbirds also have the ability of many complex vocal (发声的) patterns that help them attract mates, defend territory (领地), and strengthen their social bonds. Each songbird species has its own unique song patterns, some with characteristic regional dialects. Experienced listeners can even distinguish individual birds by their unique songs.

    A lot of what scientists know about bird song comes from studying zebra finches. A baby male zebra finch typically learns to sing from its father or other males, starting while it's still a baby bird in the nest. First comes the sensory learning stage, when the baby finch hears the songs sung around it and commits them to memory. The bird starts to vocalize during the motor learning stage, practicing until it can match the song it memorized. As the bird learns, hearing the tutor's song over and over again is helpful — up to a point. If it hears the song too many times, the imitation (模仿) becomes worse -- and the source matters. If the song is played through a loudspeaker, he can't pick it up as easily. But hide the same loudspeaker inside a toy painted to look like a zebra finch, and his learning improves.

    What if the baby never hears another zebra finch's song? Interestingly enough, it'll sing anyway. Isolated finches still produce what are called innate songs or isolate songs. A specific tune might be taught, but the instinct to sing seems to exist in a songbird's brain. Innate songs sound different from the “cultured” songs learned from other finches - at first. If isolate zebra finches start a new colony, the young birds pick up the isolate song from their fathers. But the song changes from generation to generation. And after a few generations, the melody actually starts to resemble the cultured songs sung by zebra finches in the wild.

    Every year on April 1, April Fools' Day is celebrated in many countries around the world. In France, it's called "Poisson d' Avril" or "Fish of April." In Scotland, the holiday is often called "Gowkie Day." In Iraq, the holiday is called Kithbet Neesan or "April Lie."

    History experts say people have celebrated April Fools' Day for a long time. Some believe the tradition comes from the ancient Romans more than two thousand years ago. It was a day of playing games and pretending to be someone else.

    Others say the day for fooling began in France in 1564, when King Charles changed the yearly calendar. He moved New Year's Day from April 1 to January 1. Many people did not know about the change because of communication problems back then. Some people continued to celebrate New Year's Day on April 1. Other people called them April Fools and played jokes on them.

    In the United States, April Fools' Day is just a day of joking and playing tricks on friends. These kinds of jokes are also called pranks. These jokes typically end in the prankster shouting "April Fools'!"

    Simple pranks, like telling a friend a funny lie or making prank phone calls, are still common. But, major companies also get in on April Fools' Day fun in a much bigger way. A few years ago, on April 1, Starbucks announced it was introducing new coffee cup sizes -- Plenta and Micra. The very large cups, bigger than a human head, remained useful for customers even after finishing all that coffee. According to Starbucks, the cups could be used as a rain hat, a pot for plants, or a lampshade.

    It did not take long for customers to catch on to the prank! More and more people use social media or smart phone apps to play pranks on their friends on April Fools' Day. One very annoying smart phone app, Cat Facts, sends funny facts about cats to your friends' phones, every day.

    LOS ANGELES, Nov. 12 (Xinhua)—Legendary comic book writer Stan Lee has died at the age of 95, according to media reports on Monday.

    Lee, born in Stanley Lieber on Dec. 28^th, 1922, began his career in 1939 and joined the Marvel Comics in 1961.

    He is considered as one of the most legendary names in the history of comic books and the leading creative force behind the rise of Marvel Comics. He co-created iconic fictional characters such as Spider-Man, X-Men, the Avengers, and many more.

    Lee's characters often have super powers, but they also have weaknesses. They were humans, not gods. They not only struggled to save the world, but also to pay their bills, make friends, and hold jobs. This made Marvel comic book heroes stand apart from its competitor DC, which produced the seemingly perfect heroes like Superman and Wonder Woman. Those superheroes have been adapted into blockbuster films, most of which were made after Disney acquired Marvel in a 4-billion-dollar deal in 2009.

    In a statement, Bob Iger, chairman and CEO of the Walt Disney Company said Stan Lee was as extraordinary as the characters he created.

Marvel also praised Lee on its website by putting on one of Lee's famous quotes, which goes, "I used to be embarrassed because I was just a comic-book writer while other people were building bridges or going on to medical careers. And then I began to realize: entertainment is one of the most important things in people's lives. Without it, they might go off the deep end. I feel that if you're able to entertain, you're doing a good thing. "

Praise from his Hollywood peers and colleagues was generous. President of Marvel Studios Kevin Feige appreciated Lee's unparalleled impact on the industry. "No one has had more of an impact on my career than Stan Lee," Feige said. "Our thoughts are with his family and the millions of fans who have been forever touched by Stan's genius, charisma and heart."

    Physical education, or PE, isn't required for all high school students. In some schools, it isn't offered for some different reasons. But should high school students have physical education? The answer is certainly "yes".

    Today many people don't do sports. But as is known to all, doing sports is very important for an adult. Teaching teens the importance of a healthy lifestyle and making fitness plans now can help teens put exercise in the first place as an adult.

    High school isn't that easy. Many students are under a lot of stress. Stress can be harmful to a student's studies and life. Doing sports can help them deal with stress better, helping them live a happier life at school.

    The American Heart Association says that 10 million kids and teens suffer from obesity (肥胖症). Teens should get 60 minutes of physical activity per day to control their weight and to help their bones get stronger. The increase in activities that don't get teens to move around, such as video games and computer activities, means many teens don't get their required exercise. PE classes act as a public health measure to encourage physical activities and help teens have healthy weights.

    Not doing sports increases teens' risk of developing many diseases. An active lifestyle offers a good way of protection from these health problems. As much as 75 percent of health-care spending goes toward treating medical conditions that can be hindered by lifestyle changes, according to the American College of Sports Medicine.

    According to the President's Council on Fitness, Sports and Nutrition (PCFSN), students who performed five hours of physical activity each week improved their academic (学业的) performance. Students from programs with no physical activity, who used the extra time for classroom study, did not perform better on tests than those who gave up some study time in support of physical education.

How much of your monthly grocery list ends up in the garbage? A new study reveals the average American spends nearly $1,500 per year on food they'll never eat.

A recent survey of 2,000 Americans reveals the average shopper wastes $1,493.93 on food per year. That's almost a fifth of their grocery bill after every shopping trip. One tenth of respondents claim they "never" purchase food they don't end up eating, while three in 10 say this is something they "always" do.

Half of respondents prefer to head to the grocery store alone, and when they do, half are more likely to stick to their list and 36% are less likely to buy food they don't want or need.

Keeping the list in mind is important, as 38 percent are more likely to let food be wasted if it wasn't originally on their shopping list. Seven in 10 add that when they go to the store on an empty stomach, they're more likely to buy foods they won't eat. So they don't do that that way. Some respondents appear to be in a wasteful cycle when it comes to food waste. Nearly half usually buy and end up wasting the same food every month because they think they'll get around to eating it.

"We can all do better to limit food waste by sticking to grocery lists and, when we get home, prioritizing eating our foods that are_perishable, like fruits, vegetables, and dairy products" says Avocado Co-Founder and CMO Mark Abrials in a statement.

Three-quarters feel guilty about throwing away uneaten food because it's a waste of money — and 48 percent feel the same, due to the harm food waste causes to the environment. "When it comes to food waste, nobody is perfect," Abrials adds. "But in order to consider our environmental impact, not to mention wasted money, we think it's essential to be thoughtful about everything we purchase — whether that's food, mattresses or other goods."