Ever feel like you've been hit on the head after a bad night's sleep? According to scientists, the thought isn't as unbelievable as it seems.

    A study found going without sleep for just one night causes changes in the brain similar to those that occur after a blow to the head. The researchers said the healthy young men examined in the study showed a sudden increase in the same chemicals which indicate brain damage. Professor Christian Benedict, of Uppsala University, Sweden, explained that the chemicals NSE and S-100B are biomarkers for brain damage, such as concussion(脑震荡). He said, "What we found was their levels in the blood rose in the group that went without sleep for a night. This was not to the extent that would happen after a head injury, for instance, but it was still significant. During sleep, the brain cleans poisonous substances off itself."

    Benedict also said previous studies which linked a lack of sleep with increased risk of Alzheimer's, Parkinson's and multiple sclerosis could applaud his study. The rise of the chemicals in the blood after sleep loss may suggest not getting enough sleep contributes to a loss of brain tissue, he explained. Benedict, whose study is published in the journal Sleep, added, "In conclusion, the findings of our experiment indicate a good night's sleep may be critical to maintaining brain health."

    A third of the UK population suffer from sleep-related problems, while the average person now sleeps for only seven hours a night, compared with almost nine a few decades ago. Many scientists believe irregular sleeping patterns lead to illnesses ranging from aches and pains to heart disease, while less than eight hours' sleep a night can lower the IQ the next day.

    Guinness World Records has long been recording some of the most amazing and astonishing travel and tourism facts. Here we are sharing some of the most unbelievable record-breaking accounts, all fully fact-checked and Guinness-approved.

Largest Ice Structure—The Ice Hotel in Sweden

    Each year, the ice hotel in Jukkasjarvi, Sweden, is rebuilt from blocks of frozen ice from the nearby River Torne. Covering an area of 5,500 square metres, the hotel is unsurprisingly open seasonally, from December to March, when it melts away. In 2015, the hotel celebrated its 25^th anniversary, complete with an ice bar, an ice church and ice bedrooms—one even featured a London Tube carriage made entirely of ice.

Tallest Waterfall—Angel Falls, Venezuela

    The largest waterfall by vertical(垂直的) area may be Victoria Falls, which sit on the border between Zimbabwe and Zambia, but it's South America that's home to the world's tallest.

    Angel Falls, located in Bolivar, Venezuela, has an impressive, uninterrupted drop of 807 metres.

    It was actually named after the American pilot, Jimmie Angel, who first recorded it in his logbook on November 16, 1933.

Largest Area of Glowing Sea—Indian Ocean, near Somalia

    Bioluminescence(生物体发光) is the production and emission of light by a living thing and can be used to explain the surprising phenomenon(现象)of “glowing oceans.”

    It was in 1995 that scientists detected glowing sea in the Indian Ocean—just off the coast of Somalia-via satellite, The water was more than 250 kilometres long, and it was all thanks to the bacteria called phytoplankton.

Most Expensive Hotel Room—The Royal Penthouse Suite at Geneva's Hotel President Wilsom

    This particular suite is just the ticket, costing as much as US$83,000(£53,760)per night.

    But the high price will gain you access to 12 bedrooms and 12 marble bathrooms across 18,000 square feet.

    Emily Temple-Wood was 12 years old the first time she was bullied(欺凌) online. They left ugly comments on her Wikipedia and Facebook pages about her looks “that would make my mother's hair curl.” says Temple-Wood, now 22 and in medical school. The reason? “I was a woman on the Internet,” she said.

    Over the years, she considered how she might take revenge(复仇). Then, as a freshman in college, it hit her: “What do misogynists (men who hate women) hate most?” she asked herself. “Women who are productive!” Her solution: For every rude comment she received, Temple-Wood would post a biography(传记) of a woman scientist, and thus, in 2012, Wiki Project Women Scientists was born. She wrote about her heroes, like Barbara McClintock, who received the 1983 Nobel Prize in Physiology or Medicine, and Caroline Still Anderson, one of the first African American women to become a doctor in the United States, in the late 1800s. With help from other women, many of them scientists who have also been bullied online, Temple-Wood has published hundreds of these biographies and women of all ages have taken notice.

    “When I was a kid, I could count the number of women scientists I knew about on one hand,” wrote Siko Bouterse, who used to work for the Wikimedia Foundation. “But our daughters have the chance to get much more knowledge about scientists who look like them because of Emily.

    The ugly comments still come, says Temple-Wood. Being a strong woman online is not easy. “We all have days when we break down and need to have a glass of wine,” she says. “I tell people who are being bullied that it's OK to be sad. But now you need to find a productive way to take revenge.”

News China

Circulation (发行量): 1 Year, 12 Issues

Cover Price: $47.88 Price For You: $19.99

Product Description: News China is the English edition of China Newsweek. The magazine covers the latest Chinese domestic news in politics, business, society, environment, culture, sports and travels, etc. It is the first comprehensive news magazine for readers interested in China.

Better Life

Circulation: 1 Year, 12 Issues

Cover Price: $44.55 Price For You: $ 15.00

Product Description: Designed for those who have a strong interest in personal lifestyle. Better Life is America's complete home and family service magazine. It offers help with food, recipes, decorating, building, gardening, family health, money management, and education.

Apple Seeds

Circulation: 1 Year, 9 Issues

Cover Price: $44.55 Price For You: $33.95

Product Description: Apple Seeds is an award winning magazine filled with stories for kids aged from 7 to 9. The cover is very soft, providing durability （耐用性）that allows each issue to be enjoyed for many years to come. Besides, there is a big surprise for you-it's being sold at a more favorable discount than usual.

Humor Times

Circulation: 1 year, 12 Issues

Cover Price: $36.00 Price For You: S11.95

Product Description: Humor Times is for those who love to laugh! Full of cartoons and humor columns, it shows up in your mailbox once a month and keeps you smiling all year round! In today's world, you need a reason to laugh. So let's find it in Humor Times.

    If a family member blames you for something you have done, it is important to be careful about how you defend yourself. It is not a good idea to use ways that cause hurt, even if they would help you make a valid point. If you can think of an instance where the other person has done exactly what they accuse you of, for example, it would not be good manners to throw it in their face. You should only bring it up if you don't have a choice. Then, you should make sure that you do it respectfully.

    Even if a family member intentionally goes against reasonable wishes you may have, you should understand that people see even the most fundamental things in very different ways. Remember that people are different. If you consider any noise after midnight to be intolerable, for example, others may see it is completely acceptable. It can take them a great deal of time to change their behavior for a demand that they do not understand.

    Think about the family conflicts that you are worried about now. Check to see if your parents had similar problems. People who grow up with parents who fight unfairly often repeat the same behavior. Consider changing the unfair habits that you grew up with.

    Understand that memories tend to change. In long-standing family disputes, all parties involved tend to have completely different recollections of the original problem.

    Families are a curious concept—while family members often feel nothing but annoyed for one another, they will also often be there for them if they should ever be in serious trouble. When you feel resentment for someone, think about how far you would go for them if they happened to be in trouble. It could help soften you. Think about how you care for the other person.

Once upon a time, science fiction was just a style among other styles. There were crime stories, there were horror stories, there was literary fiction, and there was science fiction. But today science themes dominate these other styles. It's difficult to think of much modern crime, horror or "serious" fiction that doesn't involve science.

And its not just books. With every second movie and computer game having a sci-fi element, science fiction seems to have controlled our entire entertainment culture. It's clear that if we want to define science fiction, we should relate it to the role that science plays in our lives.

Although some experts have claimed to be able to trace sci-fi back to ancient times, it is more reasonable to find it in initial form in the 19^th century, when industrial societies arose. One of the features that set industrial societies apart from other kinds was the increasing part that science played in everyday life. Factories with vast machines turned out huge quantities of goods, which were transported by trains, motor vehicles and ships all over the world. Cities were built on the back of technology, with electricity in homes and hospitals helping everyone to lead healthier, more convenient lives. All of these changes had great effects not only on people's real lives, but on their imaginative ones.

Writers began to describe these changing physical and mental landscapes, eventually giving science fiction a large and devoted fan base of especially young readers, who found that it spoke to their curiosity about the future that science would create.

But sci-fiction reflected fears about science more than it did hopes. These typical early science fiction novels might be a UK novel like H. G. Wells' The War of the worlds (1897). With great skill, Wells played upon the fears of technology by imagining Earth under threat by a civilization-that of men from Mars.

The science fiction of today expresses the impact of the computing revolution, robotics and our environmental challenges, while it is less concerned with "little green men from Mar" and other themes of past sci-fiction.

Given that science, technology and polities are always intertwined, contemporary science fiction often has a great deal to say about power. Many recent novels-like American Cory Doctorow's Little Brother (2008)-are concerned with government and security service "conspiracies (阴谋)" against the people, particularly as the revelations of whistleblowers like Edward Snowden sink in. This can give sci-fi writing a "skeptical (怀疑的)" feel.

This underlines one of the features that remains constant between the beginnings of the empire of science fiction and its state today.

As then, so now: We want to read about how fearful the future will be, not how it will be a paradise.