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    Suppose you're in a rush, felling tired, not paying attention to your screen, and you send an email that could get you in trouble.

    Realisation will probably set in seconds after you've clicked “send”. You freeze in horrors and burn with shame.

    What to do? Here are four common email accidents, and how to recover.

    Clicking “send” too soon

    Don't waste your time trying to find out if the receivers has read it yet. Write another email as swiftly as you can and send it with a brief explaining that this is the correct version and the previous version should be ignored.

    Writing the wrong name

    The sooner you notice, the better. Respond quickly and briefly, apologizing for your mistake. Keep the tone measured: don't handle it too lightly, as people can be offered, especially if your error suggests a misunderstanding of their culture(i.e. incorrect ordering of Chinese names).

    Clicking “reply all” unintentionally

    You accidentally reveal(透露)to entire company what menu choices you would prefer at the staff Christmas dinner, or what holiday you'd like to take. In this instance, the best solution is to send a quick, light-hearted apology to explain your awkwardness. But it can quickly rise to something worse, when everyone starts hitting “reply all” to join in a long and unpleasant conversation. In this instance, step away from your keyboard to allow everyone to calm down.

    Sending an offensive message to its subject

    The most awkward email mistake is usually committed in anger. You write an unkind message about someone, intending to send it to a friend, but accidentally send it to the person you're discussing. In that case, ask to speak in person as soon as possible and say sorry. Explain your frustrations calmly and sensibly—see it as an opportunity to clear up any difficulties you may have with this person.

    The softshell turtle species is officially listed as endangered by the IUCN Red List. Scientists long thought softshell turtles were extinct in the Cambodian part of the Mekong River until they discovered some stragglers (掉队者) in the early 2000s.

    The species had quite a wide historical range across Asia, but much of that range is now completely gone. Much of the turtle's habitat in Southeast Asia have disappeared due to urban and industrial development along the Mekong River. The sand where turtles multiply is routinely carried away for use in construction projects, while fishing nets lift up hatchlings. People also take turtles and their eggs to sell for food.

    Initial surveys in 2003 and in 2007 found two small populations of the softshell turtles along a 30-mile stretch (水域) of the Mekong River. Since then, conservation groups have worked with local communities and officials to increase the wild population of these endangered turtles, including a program to hire former egg collectors to help search for and protect nests instead of harvesting the eggs.

    For the last decade, WCS, Conservation International, the Turtle Survival Alliance and local groups have worked to protect turtle nests. Their goal is to ensure eggs will multiply and hatch, and that baby turtles grow strong enough to eventually take care of themselves in the wild.

    A team recently released 150 hatchlings back into their natural habitat, bringing the total to more than 7,700 baby turtles in the past 10 years.

    Although English is not as old as Chinese, it is spoken by many people around the world every day. English speakers are always creating new words, and we are often able to know where most words come from.

    Sometimes, however, no one may really know where a word comes from. Did you ever think about why hamburgers are called hamburgers, especially when they are not made with ham? About a hundred years ago, some men went to America from Europe. They came from a big city in Germany called Hamburger. They did not speak good English, but they ate good food. When some Americans saw them eating round pieces of beef, they asked the Germans what it was. The Germans did not understand the question and answered. "We came from Hamburger." One of these Americans owned a restaurant, and had an idea. He cooked some round pieces of beef like those which the men from Hamburger ate. Then he put each between two pieces of bread and started selling them. Such bread came to be called "hamburgers". Today "hamburgers" are sold in many countries around the world.

    Whether this story is true or not, it is certainly is interesting. Knowing why any word has a certain meaning is interesting, too. The reason, for most English words, can be found in any large English dictionary.

    Filled with much housework, meals and childcare at home, many people feel that being at work sounds more like having a picnic. Even for those who have a happy family life, they feel actually more stressed at home than at work.

    Recently, a study carried out by the researchers at a university in the USA found lower levels of hormone released in response to stress in a majority of subjects when they were at work compared to when they were at home. This was true for both men and women, and parents and people without children.

    Both men and women showed less stress at work. But women are more likely to report feeling happier there. Men were more likely to feel happier at home. Experts say there are other reasons why work is less stressful than home for many. “Paid work is more valued in society,” said Sarah Damaske, the lead researcher on the study, “Household work is boring and not particularly rewarding.”

    We get better at our job with time and the increased competence means less stress and more rewards. Yet none of us, no matter how long we've been doing it, ever truly feels like an expert at parenting or even at marriage.

    The support and friendship of co-workers also offer stress relief. At home, meanwhile, stress spreads and increases quickly. “That's the reason why most housewives wish they were the bread earners,” Dr. Damaske says.

    Much of the advice to families and couples includes the warning to “leave work stress at office” and even to change our mind-set from work to home, for example, a walk around the block. The recent findings, though, suggest our home life, not our attitude, might be due for some change.

    The world maps will soon be altered to reflect an eighth continent! Dubbed "Zealandia" the landmass that lies east of Australia covers 4.9 million km. Over 94 percent of it is submerged (淹没的) in the southwest Pacific Ocean, with just the islands of New Zealand and New C aledonia visible above sea level.

    To be clear, the underwater land is not a recent find. Researchers have known about its existence since 1995 when Bruce Luyendyk discovered and proposed an eighth continent that he called Zealandia. At the time, the area was dismissed as a collection of islands and land fragments (碎片), or at the most, classified as a micro continent—a landmass of continental crust that is not geologically connected to the nearest continent, in this case, Australia.

    However, after observing the areas features on an underwater topography map, New Zealand geologist Nick became convinced that Zealandia is a continent. Mortimer says that while Zealandia is much smaller than our seven continents, at over half the size of Australia, it is unfair to classify it as a microcontinent. The geologist argues, “If you could pull the plug on the world's oceans, then Zealandia would probably long ago have been recognized as a continent.”

    Geologist Christopher Scotese argues that too much of the landmass is underwater, asserting it's "almost a continent the way Pluto is almost a planet." Richard Ernst, a geologist, proposes coining a new term minicontinent—for Zealandia. He thinks this is perfect given that it is too large to be called a microcontinent and too small to be classified as a full-sized continent. Given that there is no international panel to decide the fate of Zealandia, its future as a continent is uncertain. Mortimer hopes that if supporters start using the term Zealandia, it may eventually catch on. Whether that happens remains to be seen, but for now, we will have to be satisfied with just seven continents!

    It is every kid's worst nightmare(噩梦) and six-year-old Jaden Hayes has lived it twice. First he lost his dad when he was only at the age of four and then last month his mom died unexpectedly in her deep sleep.

    "I tried and I tried and I tried to get her awake, but... I just couldn't," said Jaden.

    No one could imagine how heartbroken Jaden was.

    But there's another side to his sadness. A side he first made public a few weeks ago when he told his aunt, Barbara DiCola, and now his guardian(监护人)after both his parents died, that he was sick and tired of seeing everyone sad all the time. And he had a plan to fix it.

    "And that was the beginning of it," said Barbara. "That's where the adventure began."

    Jaden asked his aunt Barbara to buy a bunch of little toys and bring him to downtown Savannah, Georgia near where he lives, so he could give them away to anyone who will smile to him. "I'm trying to make people smile," said Jaden.

    Jaden targets people who aren't already smiling and then turns their day around. He's gone out on four different occasions now and he is always successful. Even if sometimes he doesn't get exactly the reaction he was hoping for.

    It is just so overwhelming to some people that a six-year-old orphan would give away a toy -- expecting nothing in return -- except a smile.

    "I'm depending on it to be 33, 000," said Jaden. When asked if he thinks he can make that goal, he answered: "I think I can."