The streams are about 12 to 15 feet wide and 300 feet or more long, scientists said. "What we're dealing with is wet soil, thin layers of wet soil, not standing water," said Aifred  McEwen of the University of Arizona at Tueson! the principal scientist for the Mars Reconnaissance Orbiter's high-resolution imaging experiment,

     Because liquid water is essential to life, the findings could have major implications for the possibility of Martianlife, There searchers said further exploration is needed to determine whether microscopic life exists on the planet.

    The presence of liquid water could also make life easier for astronauts visiting or living on Mars. Watercould be used for drinking and for creating oxygen and rocket fuel. NASA's goal is to send humans there inthe 2030s.

    The evidence of flowing water consistslargely of dark, narrow streaks(条痕) on the surface that tend to appear and growd uring the warmest Martian months and fade the rest of the year.

    Mars is extremely cold even in summer,and the streaks are in places where the temperature is as low as minus 10 degrees Fahrenheit. But salt can lower the freezing point of water and melt ice.

    The source of the water is a mystery. Scientists noted it could be melting ice. It could be an underground a quifer, which is rock or sand that can hold water. It is possibly water vapor from the thin Martian atmosphere, Or it may be a combination Michael Meyer, lead scientistfor NASA's Mars exploration program, said the only definitive way for now to determine whether there's life on Mars is to collect rocks and soil foranalysis on Earth - something a U.S. lander set for lift-off in 2020 will do.

    Good afternoon, and welcome to England. We hope that your visit here will be a pleasant one. Today, I would draw your attention to a few of our laws.

    The first one is drinking. Now, you may not buy wine in this country if you are under 18 years of age, nor may your friends buy it for you.

    Secondly, noise. Enjoy yourselves by all means, but please don't make unnecessary noise, particularly, at night. We ask you to respect other people who may wish to be quiet.

    Thirdly, crossing the road. Be careful, the traffic moves on the left side of the road in this country. Use pedestrian crossing(人行横道) and don't take any chance when crossing the road.

    My next point is about rubbish. It isn't lawful to drop rubbish in the street. When you have something to throw away, please put it in your pocket and take it home, or put it in a dustbin.

    Finally, as regards smoking, it is against law to buy cigarettes or tobacco if you are under 16 years of age.

    I'd like to finish by saying that if you require any sort of help or assistance, you should contact the police, who will be pleased to help you. You can call, write or directly go to any policeman.

    One half of the brain remains on high alert during the first night of sleep in a new space.

    Over the course of three experiments on 35 young, healthy volunteers, researchers measured brain activity during two nights of sleep. They found that part of the left side of the brain remained more active than the right side only on the first night, specifically during a deep sleep stage.

    “When you sleep in a new place for the first time, a part of one side of the brain seems to stay awake, so you could wake up faster if necessary,” said senior study author Yuka Sasaki of Brown University.

    While this may be bad news for business travelers who regularly make brief overnight trips, it may not be as troublesome for people who go away for longer periods of time, Sasaki added by email.

    To see how being in a strange place affects sleep, Sasaki and colleagues performed a series of lab tests on their subjects.

    When they stimulated（刺激） the left side of the brain with sounds in the right ear during deep sleep on the first night, that led to greater possibility of waking and faster action upon waking, than if sounds were played in the left ear to affect the right side of the brain. On the second night, there wasn't any difference in reactions to tests between the left and right sides of the brain, even during deep sleep. This suggests that there is a first-night-only effect specifically in one side of the brain during deep sleep, the authors conclude.

    One limitation of the new study is its focus on healthy volunteers, which means the results may not apply to people with sleep disorders, the authors note.

    While it's possible that the findings may explain poor sleep among frequent travelers, the study wasn't designed to test whether these “first night effects” continue to happen to people every time they hit the road, said Patrick Finan, a researcher at Johns Hopkins University School of Medicine in Baltimore.

    Wondering what to see and do in India in November? November is an excellent month to visit India. Here are the best festivals in November, 2018 in India.

    International Yoga and Music Festival

    Organized by Nada Yoga School every year since 2008, the International Yoga and Music Festival features 50 of the best professional yoga teachers Ayurvedic（印度草药按摩）doctors， dancers, musicians, and philosophers from Rishikesh and abroad. Free classes and lectures are held with topics including yoga, Ayurveda, philosophy, and Indian classical music. There's an Indian classical music concert in the evenings as well.

    Time: November 1-7, 2018. Location: Rishikesh, Uttarakhand.

    Wangala Festival

    Also known as the 100 Drum Wangala Festival this is the biggest harvest festival of Meghalaya's Garo tribe in northeast India. Held in honor of the Sun God of fertility, the festival marks the end of the seeding season and agricultural year. It's celebrated by the beating of drums, blowing horns, and traditional dancing.

    Time: November 6, 2018. Location: Garo Hills, Meghalaya. Bandra Wine Festival

Being popular with local people for six years, the Bandra Wine Festival is a fun opportunity to sample the best wines in India. In addition to tasting wine, there are market stalls, food stalls, live music in the evenings, and dancing.

    Time: November 7-8, 2018.

    Location: D'Monte Park, Bandra West, Mumbai.

    Pushkar Balloon Festival

    The International Hot Air Ballooning Festival is an added attraction at the Pushkar Camel Fair. Similar to the Taj Balloon Festival in Agra, it's hosted by Sky Waltz, and features hot air balloons from around the world and a Night Glow Music Concert. Accommodation and balloon flight packages are offered to visitors.

    Time: November 21-23, 2018. Location: Pushkar, Rajasthan.

    Cameron is no ordinary dog, and not just because he was born on Valentine's Day. To Maggie, a first grader at Burgundy Farm Country Day School, the dog who spends most days on campus is more like a friend. When Cameron is near, Maggie feels "really, really, happy," she said, "I feel safe around him, she added." "He'll lie down and ask me to scratch his tummy," she explained, because Cameron likes Maggie.

    Cameron is one of a handful of dogs at Burgundy, a K-8 private day school in Alexandria, Virginia. Dogs started showing up there when the head of school, Jeff Sindler, brought his clumsy Labrador, Luke, to the main office building where Sindler works. After Luke died, Sindler adopted Cameron and brought him to campus, too, where the dog Maggie described as really cute" became a school favorite.

    "They don't care if you are good at basketball or a great reader, or popular," Sindler said. "They just want to be loved—equal opportunity," he added. "Cameron and the other dogs on campus—are always fastened with a rope and with their owner—go a long way toward improving students' social and emotional well-being," he said. They reduce tension and ease anxiety, and inspire happy feelings from students.

    "They bring out some important emotions/' he said, "and are especially helpful to children and adults who struggle in social communication, Children often came from challenging backgrounds: many lived in poverty, or had to travel through dangerous neighborhoods to get to school, or shared a too-crowded home. When these emotionally needy children met the dogs, they relaxed and were more prepared to learn.

    Just as important, dogs on school grounds set a positive, welcoming tone. They help preserve the school climate that is accepting, supportive and curious・"Dogs are one way to hold on to Sindler said, adding that "schools should be fun and exciting, and dogs can be a big part of that."

    For Sindler, including Cameron was all part of an effort to create a safe environment where learning could flourish.

Every Lunar New Year, China introduces a zodiac(生肖) sign from a cycle of 12 lucky animals. This year, it's the Year of the Dragon, or more{#blank#}1{#/blank#} (accurate), "the Year of the Loong". Then what's the difference?

The Western{#blank#}2{#/blank#} (describe) of dragons as "fire-breathing winged creatures" was inspired by literature such as Beowulf - the Old English epic about a Scandinavian hero{#blank#}3{#/blank#}contribution was killing monsters, including a dragon. Greek fairy tales also presented dragons{#blank#}4{#/blank#} violent sea monsters or guards of valuable{#blank#}5{#/blank#} (possession). By contrast, "loong", a word{#blank#}6{#/blank#} (create) in the 19th century, reminds people of strength and fortune, and should{#blank#}7{#/blank#} (distinguish) from its Western cousin. In Shiji, {#blank#}8{#/blank#}2, 000-year-old Chinese history book, the emperor's mother dreamed of a dragon lying on her body, {#blank#}9{#/blank#} (predict) the birth of a future emperor. Exactly for this reason, Chinese people proudly claim they are "descendants of the Loong" .

Therefore, some culture experts have been calling for a switch to "loong" {#blank#}10{#/blank#} (tell) the Chinese dragon from the frightening monsters of Western tales. The call is also in line with the push for cultural confidence to choose the preferred translation of the Mandarin word for a creature long respected in Chinese culture.