Gravity signals that race through the ground at the speed of light could help seismologists(地震学家) get a better handle on the size of large, destructive quakes soon after they hit，a study suggests. The tiny changes in Earth's gravitational field, created when the ground shifts, arrive at earthquake monitoring stations well before earthquake waves.

    “The good thing we can do with these signals is have quick information on the magnitude (震级) of the quake,” says Martin Vaillée, a seismologist at the Paris Institute of Earth Physics.

    Earthquake equipment in China and South Korea picked up gravity signals immediately after the magnitude-9. 1 Tohoku earthquake that destroyed parts of Japan in 2011. The signals appear as tiny accelerations on earthquake-recording equipment, more than a minute before the seismic waves show up.

    “We can look before the earthquake waves arrive,” says Vallée. “If we see nothing, we can say that the quake that made these was maybe large, but not huge. If we see the signals, it means we really have a very big quake. ”

    Had seismologists been monitoring for gravity changes, they might have realized sooner just how big the Tohoku earthquake was. A small increase in an earthquake's magnitude means a large change in the energy released by the quake-and the destruction expected. That information is important for emergency responders as they decide what resources to arrange.

    It'll be a major contribution if gravitational waves can beat down the time needed to know that a big earthquake is big. But much work remains before gravity signals can be considered a reliable tool in the vital minutes after a big quake. A few extra minutes of warning can save lives, particularly in coastal areas where people can flee ahead of an incoming tsunami.

    Look at the map of Spain and point at the center. You've located the country's capital and one of Europe's most beautiful cities: Madrid. This popular destination is considered a city of contrasts with its abundant historic sites, resting in the shadows of modern skyscrapers.

    History

    This city of over 3 million people is proud of Western Europe's largest royal palace, and some consider it to be Madrid's most beautiful building.

    Inside the Royal Palace 2,800 rooms are decorated in glory with museum-quality furniture and artworks. Tourists can tour 50 of these large and splendid rooms.

    Art

    The Internationally respected Prado Museum is the largest and most impressive art gallery in Spain. Opened in 1819, it is filled with works of art that feature the world's most comprehensive collection of Spanish paintings.

    Shopping

    Madrid has some of Europe's best shopping, and potential buyers love to look through the stores looking for bargains. But for 500 years, shoppers have gathered to an extremely large outdoor flea market known as the Rastro where they find everything from antiques to CDs.

    Entertainment

    No trip to Madrid is complete without seeing a performance of Spain's famous art form, flamenco. Every day, flamenco performers sing, dance or play the guitar in small cafes and grand theaters alike.

    Food

    Madrid has a wide variety of restaurants, but because the Spanish typically eat late at about 9 or 10 p.m., it's difficult to find good dinner food earlier. If you get hungry before then, the best solution is to try a tapas bar where light snacks are served. Be sure to try the jamon, a kind of dry-cured ham: Spain is famous for it.

    Carlos had been in New York for five months now, and he detested it. He would never forget the day when the plane landed. His parents had big smiles on their faces as they discussed the wonderful new life they would have in this great city. His older sister and brother looked in wonder and excitement at the buildings. Uncle Miguel and Aunt Esperanza thought of the good jobs they would get. Grandmother and Grandfather told him what a lucky boy he was to come to this wonderful city. But Carlos was lonely. The city looked big, cold, and dirty to him.

    They lived in an apartment in Manhattan. There were stores and cinemas close to their home. But Carlos didn't want these things. He loved his home in the country in Puerto Rico; he loved the green fields, the hot sun, and the lovely beaches.

    He didn't want to go to school because it made him think of his friends at home. And he didn't want to learn a new language that could never describe the world as beautifully as his own.

    He began to go down to the dock(码头), because this made him feel closer to Puerto Rico. He sat down and watched the ships. He would often find a man also sitting there looking at the sea. The man was Eric-a taxi driver who came there to escape from the noisy traffic.

    Eric noticed the young boy and felt his sadness. One day he said, “Yes, it's hard to leave your homeland. I remember when I left Norway 15 years ago. I know it's hard to start a new life in a new country, but let's face it. I did it and you can do it, too.”

    From then on the taxi driver and the young boy began to develop a deep friendship.

    Two years ago, something happened that changed the way I look at the world. On my birthday, my grandfather, walking home with his hands full of groceries, fell and hit his head on the sidewalk. Just as we were leaving to meet him for dinner, we got the call that he was in the hospital. At first, I thought nothing of it, but when I heard the whole story, I couldn't believe it. He hit his head so hard that he had a blood clot in his brain and it had to be operated on immediately. Everyone thought he would die.

    Although my grandfather survived emergency brain surgery, he had complications (后遗症). He could hardly talk and he couldn't walk. Shortly after, he was admitted to a nursing home. Today, he lives at home with my grandmother and is doing much better, but this isn't about him. It's about what I saw at that nursing home.

    I saw something that many people haven't seen, and some do often choose to ignore it, I saw more sadness in those days visiting the nursing home than I thought. In that one place were hundreds of old people who were alone and forgotten.

    So what as to be done with the situation of the old? This is not an easy question, but something must be done. Perhaps groups in the community could assign each member to one nursing home patient with whom they could keep in regular contact. Maybe a school could focus on a nursing home and send cards, pictures and letters to residents. If periodic visits were arranged, I'm sure that for some, if not many, those students would be the only visitors they had all month. These are just a few ideas; we all need to work together.

    I hope everyone to tour a local nursing home I further expect you to do something about it. You'll brighten someone's day, or maybe even his or her life.

    When my father married my mother in 1943, he gave my mother a 1937 crown coin and told her to keep it in the back of her purse and not to spend it. This would mean that she always felt that she was protected and would always have money if she really needed it.

    When I was married in 1970, my husband, who had heard this story, obtained a 1937 crown coin for me and I have always kept it in my wallet, and I have always had enough for my needs.

    A friend recently fell on hard times, partly through external (外部的) circumstances and partly through poor planning. Friends and I have loaned her money, paid her bills, given her food, and even tried to teach her budget techniques, but none of them has been a solution. She has just slipped deeper and deeper into financial trouble and depression.

    Last week she looked pale and unwell, very depressed and hopeless, very sad for a friend to see and I then thought about how the crown coin, a physical reminder of another's care and love had protected me, so I went to the bank for a $ 100 dollar-bill.

    I told my friend the story and asked her to keep the $ 100 in the back of her wallet. It turned out that she didn't have a wallet, so she put the money in a little pencil case where she kept her coins. She immediately felt better—"I feel rich, and thank you for being a good friend," she said, and we were both a bit teary.

    I went home and remembered a little wallet I had that I'd never used, and thought, "I'll give that to my friend." I opened it, and inside, found $ 100.

Embark on an exhilarating expedition across the ancient trade routes, commencing your 5-day odyssey from the heart of China to the vibrant lands of Central Asia.

Day 1 inTurpan, China: Commence your journey in the oasis city of Turpan, where you will delve into the intricate Karez Well System—a testament to the ingenuity of ancient irrigation techniques that persist in their operational capacity to this day. As the sun sets on your inaugural day, retreat to the tranquility of a family-owned vineyard, where you can meander through the verdant vineyards, engaging in conversations with the hospitable locals to gain insights into their customary way of life.

Day 2 in Urumqi, China: With the first light of dawn, set forth from Turpan to the bustling metropolis of Urumqi, the political epicenter of Xinjiang. Post a nourishing breakfast, immerse yourself in the cultural tapestry of the Xinjiang Museum, a treasure trove of diverse artworks, meticulously crafted handiworks, and historical artifacts. As you prepare to wing your way to Kashgar, seize the opportunity to amble through the vibrant Erdaoqiao Market, the most expansive marketplace in Xinjiang, teeming with a medley of goods.

Day 3 inKashgar, China: Devote this day to the leisurely exploration of Kashgar, commencing with a visit to the bustling Handicrafts Street, a cornucopia of artisanal treasures ranging from copper wares to metal and porcelain masterpieces. Pause for refreshment in a time-honored teahouse, where you can mingle with the convivial community, partaking in their animated dialogues and spirited dances. As the day draws to a close, retire to your lodgings for a rejuvenating night's rest in anticipation of the forthcoming voyage to Osh.

Day 4 in Osh, Kyrgyzstan: Upon reaching the second city of Kyrgyzstan, Osh, immerse yourself in the National Historical and Archaeological Museum Complex, a repository of cultural artifacts, handiworks, and sculptures that narrate the region's storied past. Subsequently, venture to the Jayma Bazaar, the most expansive marketplace in Central Asia, whose origins are rooted in the bygone era of the Silk Road. Should your interest lie in the silken threads of history, inquire of your guide to lead you to the Yodgorlik Silk Factory, a sanctuary where the age-old manual silk-making process is preserved.

Day 5 in Ashgabat, Turkmenistan: Conclude your journey with a serene morning train excursion, culminating in your arrival at Ashgabat, the capital of Turkmenistan. Dedicate the day to the exploration of the Parthian Fortresses of Nisa, a pivotal city from the Parthian Empire's early annals. As evening descends, return to the city to savor a meal and embark on an evening sojourn to the Ashgabat National Museum of History, where the chronicles of the nation are enshrined.