Dolphins(海豚) live in a dark underwater world. It's often impossible to see each other or anything else around them, so sound plays an important role in their survival. To communicate with each other, dolphins produce all kinds of sounds.

    Only other dolphins understand what the sounds mean. Scientists haven't uncovered their secret communication, except for one kind of whistle. It might last less than a second, but this whistle is a big deal. Why? Because these whistles are actually names of dolphins - and every dolphin has one. Scientists call these sounds a “signature whistle.” When other dolphins hear the whistle, they know which dolphin is calling.

    Dolphins often hunt by themselves but still need to stay connected to the group. Since they can't always see each other, dolphins use their signature whistles to check in with other dolphins hundreds of yards away. “In coastal areas, dolphins exchange whistles even when they're a third of a mile apart,” says Greg Campbell, who studies animals. That means dolphins shout out to group members that might be nearly five football fields away.

    What's amazing is who names the baby dolphin. Not the mother. Not an auntie dolphin or another group member. Scientists believe the baby dolphin itself comes up with the signature whistle. Like human babies, a baby dolphin plays with sounds throughout its first year. While testing its sound skills, a baby dolphin is doing something amazing. It's creating or figuring out its signature whistle. How or why it chooses its signature whistle is not clear. Studies show that most of the time the signature whistle is nothing like its mother's or group members' whistles.

    When the baby dolphin is about a year old, its signature whistle is set. It repeats it often so the other dolphins learn to recognize it.

    Deciphering(破译) dolphin names is just the beginning of figuring out what dolphins communicate about. Do they chat about sharks? Discuss the tides? Maybe they even have a name for people. Someday scientists are to decipher the rest of dolphins' communication.

I'm seventeen. I had worked as a box boy at a supermarket in Los Angeles. People came to the counter and you put things in their bags for them and carried things to their cars. It was hard work.

While working, you wear a plate with your name on it. I once met someone I knew years ago. I remembered his name and said, "Mr. Castle, how are you?" We talked about this and that. As he left, he said, "It was nice talking to you, Brett." I felt great, he remembered me. Then I looked down at my name plate. Oh, no. He didn't remember me at all. He just read the name plate. I wish I had put "Irving" down on my name plate. If he'd have said, "Oh yes, Irving, how could I forget you?" I'd have been ready for him. There's nothing personal here.

The manager and everyone else who were a step above the box boys often shouted orders. One of these was: you couldn't accept tips. Okay, I'm outside and I put the bags in the car. For a lot of people, the natural reaction is to take a quarter and give it to me. I'd say, "I'm sorry, I can't." They'd get angry. When you give someone a tip, you're sort of being polite. You take a quarter and you put it in their hand and you expect them to say, "Oh, thanks a lot." When you say, "I'm sorry, I can't." they feel a little put down. They say, "No one will know." And they put it in your pocket. You say, "I really can't."

It gets to a point where you almost have to hurt a person physically to prevent him from tipping you. It was not in agreement with the store's belief in being friendly. Accepting tips was a friendly thing and made the customer feel good. I just couldn't understand the strangeness of some people's ideas. One lady actually put it in my pocket, got in the car, and drove away. I would have had to throw the quarter at her or eaten it or something.

    I had decided that one year was enough. Some people needed the job to stay alive and fed. I guess I had the means and could afford to hate it and give it up.

    For twenty years, I saved all my college course notes and textbooks: that's a lot of paper.  Worse, it wasn't easy to carry them around—and trust me, they weren't light — on at least seven moves. Yet I never once looked at them. They sat in our basement, covered in a thick layer of dust. If books and papers could wonder, they'd wonder why they were still under our stairs after all those years. What were my plans for them? When would the Big Day come?

    Well, the Big Day eventually did arrive; only it was different than expected. My wife, always more accepting changes than I am, finally convinced me to clear out the entire mess.

    The pain I experienced was also unexpected. I didn't feel nostalgia(怀旧的), or suffer pains for long-lost magical moments of my education. No, what hurt me was to come across those terrible papers I'd written, reminders of poor study habits, immaturity(不成熟), and an embarrassing lack of comprehension. It was great to get rid of them. I won't have to carry those dusty, filthy(脏兮兮的) things on our next move. But it was also a clearing of personal history. Initially, I struggled with this. My books, my notes, and my papers were primary source materials, documenting an important time in my life. To clear them out was to clear out the truth. What I've learned since taking this leap is that the lesson is more important than the truth. I feel as if much of my real education during my college years isn't in the documents but now in me. So I am glad to free myself of this physical burden of carrying them around. And what's better is that I don't need to look back on those painful moments. They belong to the past.

    You might want to consider doing something similar, either under the stairs of your basement or in your mind. Not so long ago, a very smart person created a new holiday—Discardia!—to be celebrated four times a year. It's a great idea, and every time I clear things out, I feel better physically and psychologically. Discardia's slogan is “Let go of everything that doesn't make your life awesome!” What is the personal rubbish piling in your life? Clear it out and make your life awesome.

    Here we introduce some rental houses to you.

    Apartment Levant in Komiza

    Overlooking one of the most beautiful fishing villages in Croatia, our two-storey house also gives you a full view of Komiza bay as well as neighboring island of Bisevo.The apartment has a wide，covered balcony and a small garden with lemon trees. It is only 10 minutes' walk from the centre of the village, although it is on the edge of the village, with forests behind the house.

    Apartment Domina

    Located in the centre of the city, the apartment is protected as a historical site. All other facilities are at your fingertips such as restaurants, shops and museums. The apartment is fully equipped and air-conditioned, having a kitchen with a dishwasher, a satellite TV and the free Web access. It contains a bedroom with a double bed and antique furniture. Besides, the apartment offers pet-friendly accommodation.

    Apartment Tonka

    The apartment is located in an old stone house in the centre of Komiza. It offers two bedrooms, each with a separate bathroom, and a living room with a furnished kitchen. The house is only a couple of minutes away from the old harbor, along the old town's street where you can enjoy Komiza's rich cultural history. The bus stop is less than 200 meters away, near the fruit and vegetable market.

    Pearl of Issa

    This two-bedroom apartment is only a few minutes' walk from beautiful beaches, shops, restaurants, cafés and bars. It consists of two bedrooms, a fully equipped modern kitchen, a dining room and a resting area with a sofa, which can be used as an extra sleeping place for one person, a bathroom and a balcony with comfortable garden furniture and barbecue equipment.

    Boomerang children who return to live with their parents after university can be good for families, leading to closer, more supportive relationships and increased contact between the generations, a study has found.

    The findings contradict research published earlier this year showing that returning adult children trigger a significant decline in their parents' quality of life and wellbeing.

    The young adults taking part in the study were “more positive than might have been expected” about moving back home – the shame is reduced as so many of their peers are in the same position, and they acknowledged the benefits of their parents' financial and emotional support. Daughters were happier than sons, often slipping back easily into teenage patterns of behaviour, the study found.

    Parents on the whole were more uncertain, expressing concern about the likely duration of the arrangement and how to manage it. But they acknowledged that things were different for graduates today, who leave university with huge debts and fewer job opportunities.

    The families featured in the study were middle-class and tended to view the achievement of adult independence for their children as a “family project”. Parents accepted that their children required support as university students and then as graduates returning home, as they tried to find jobs paying enough to enable them to move out and get on the housing ladder.

    “However,” the study says, “day-to-day tensions about the prospects of achieving different dimensions of independence, which in a few extreme cases came close to conflict, characterised the experience of a majority of parents and a little over half the graduates”.

    Areas of disagreement included chores, money and social life. While parents were keen to help, they also wanted different relationships from those they had with their own parents, and continuing to support their adult children allowed them to remain close.

    Yesterday I cleared up my house and I mean really cleared up my house. The room that gave the most results was my husband's "office". There I found: one right-footed shoe, size 10 (he lost the other one somewhere), a set of Star Wars videos and two small china cats someone gave me last birthday. I collected these "finds" and took them downstairs and logged (登录）on to eBay: the answer to all our rubbish.

    What is eBay? It aims to provide a global trading platform where almost anyone can trade almost anything. The idea came from Pierre Omidyar. Born in Paris, Omidyar moved to Washington when he was still a child. At High School he became very interested in computer programming and after graduating from Tufts University in 1988, he worked for the next few years as a computer engineer. In his free time he started eBay as a kind of hobby, originally offering the service free by word of mouth. By 1996 there was so much traffic on the site that he had to upgrade and he began collecting fees. Joined by a friend, Peter Skoll and in 1998 by his dynamic CEO, Meg Whitman, he has never looked back. Even in the great dot-com crashes of the late 1990s eBay went from strength to strength. It is now one of the ten most visited online shopping sites on the Internet.

    If you think about it, it's a perfect Internet idea. All you have to do is take an e-photo, write a description, fill out a sales form and you're in business; the world is your market place.

    Some of the more bizarre goods up for offer have been a piece of French bread, partially eaten by Justin Timberlake, advertising space on a man's head, and a pair of used false teeth.

    One week later I am proud of having a clean and tidy home and € 110 in cash. Someone even bought the shoe.