A biologist from the National Park Service discovered a rare and unusual mammoth(猛犸) skull(颅骨) buried in a 13,000-year-old rock layer on the Santa Rosa Island, the second largest landmass in the Channel Islands, California. The fossil of the extinct giant animal is leaving many paleontologists(古生物学家) scratching their heads. Despite the fact that it's possibly the best preserved mammoth skull ever found and of high scientific importance, the species of the individual it belonged to can't seem to be identified yet—it's too big to be a pygmy(特别矮小的) mammoth and too small to have come from a Columbian mammoth. Some say it's a new species while others believe the truth lies somewhere in between.

    The first mammoths showed up in North America around two million years ago, but it was only during the last two ice ages that the Columbian species, which could grow to be up to 14 feet tall, made its way to the Channel Islands 100 miles west of Los Angeles. Once the ice melted, many populations became trapped on the island and evolved into pygmy mammoths, an endemic species(地方种) to the Channel Islands which grew only to six feet tall.

    Judging from its size, the newly found mammoth skull doesn't seem to fit any of the two species, Columbian or pygmy. To make things even more confusing, one of its two tusks(象牙) is nearly five feet long and coiled in a manner that resembles those of fully grown mammoths but the left tusk is shorter and sloped, more like a juvenile(青少年).

    This has caused some scientists to say the Santa Rose skull may belong to a transitional species. Whatever's the case, a following examination of the mammoth's teeth should put the matter to rest. The analysis will also tell us how old the mammoth was when it died, so we can tell for sure whether it was an adult or juvenile.

    More interesting than the mammoth's lineage, however, might be its story. The giant mammal lived 13,000 years ago or roughly the same timeline of the “Arlington Man”, a 13,000-year-old human skeleton also found on Santa Rosa. Some 3,000 years later humans were already spread throughout the continent and the Channel Islands' mammoth went extinct. The present finding might help reveal a link between the two.

    The remains also seem to confirm a long-held assumption that there were two mammoth migrations to the Channel Islands. “The discovery of this mammoth skull increases the probability that there were at least two migrations of Columbian mammoths to the island: during the most recent ice age 10,000 to 30,000 years ago, as well as the previous ice age that occurred about 150,000 years ago,” said USGS geologist Dan Muhs.

    Sandra Cisneros was born in Chicago in 1954 to a Mexican American family. As the only girl in a family of seven children, she often felt like she had "seven fathers ", because her six brothers, as well as her father, tried to control her. Feeling shy and unimportant, she hid herself into books. Despite her love of reading, she did not do well in elementary school because she was too shy to participate.

    In high school, with the encouragement of one particular teacher, Cisneros improved her grades and worked for the school literary magazine. Her father encouraged her to go to college because he thought it would be a good way for her to find a husband. Cisneros did attend college, but instead of searching for a husband, she found a teacher who helped her join the famous graduate writing program at the University of Iowa. At the University's Writers' Workshop, however, she felt lonely—a Mexican American from a poor neighborhood among students from wealthy families. The feeling of being so different helped Cisneros find her "creative voice".

    "It was not until this moment when I considered myself truly different that my writing acquired a voice. I knew I was a Mexican woman, but I didn't think it had anything to do with why I felt so much imbalanced in my life, but it had everything to do with it! That's when I decided I would write about something my classmates couldn't write about."

    Cisneros published her first work, The House on Mango Street , when she was twenty-nine. The book tells about a young Mexican American girl growing up in a Spanish-speaking area in Chicago, much like the neighborhoods in which Cisneros lived as a child. The book won an award in 1985 and has been used in classes from high school through graduate school level. Since then, Cisneros has published several books of poetry, a children's book, and a shortstory collection.

    Rescue officials in Poland are working quickly to clear one of the country's highways. The roadway is covered with a sticky brown material. It is blocking cars from both directions.

    What is causing the mess? Milk chocolate. The problems began early Wednesday, after a huge truck carrying many tons of liquid chocolate overturned. Chocolate spilled out. It spread across six driveways of Poland's A2 highway.

    The liquid chocolate solidified（凝固）as it cooled, causing even more difficulties. The accident happened near the western Polish town of Slupca. Bogdan Kowalski is with the fire fighters of Slupca. He told the Associated Press that “the cooling chocolate is worse than snow”.

    Videos published on social media showed rescuers and cleaners were trying to move the sticky brown mess with a bulldozer（推土机）.

    The private Polish broadcaster TVN24 reported that the driver of the truck was taken to a hospital with a broken arm. The accident happened in the morning when there was little traffic. Nobody else was harmed.

    The sticky situation became a hot topic on social media. Some people offered to help the clean-up workers by eating the chocolate themselves.

    Marlene Kukawa is a media officer for Slupea police. She told the New York Times that rescue workers needed to remove the truck from the highway first. “The cleanup”, she said at the time, “will take a few hours or more.” She added that accidents are rare in this part of the A2 highway. And, she told the New York Times, she is sure the area has never experienced something quite like a huge chocolate spill.

    The British economy is showing the greatest signs of stress since the Eurozone crisis and fears of a double-dip recession（衰退）six years ago, as worrying reports show the steepest fall in manufacturing（制造业）output and the greatest degrees of pessimism among employers since 2012. Concerns over Brexit（英国脱欧）and a slowdown for high street spending are among the major factors contributing towards 2018 being the worst time in six years for British firms planning to take on new staff, according to a closely watched survey conducted by the employment firm ManpowerGroup.

    Watched by the Bank of England and the government for early warnings of hiring increases or downturns, the quarterly poll（季度民意调查）of about 2,000 major employers from nine different industry sectors across the UK found a net balance of only 4% planning to hire more staff rather than cutting back.

    The weakest outlook from the survey was reserved for the banking and finance industry, which recorded the worst outlook since the depths of the financial crisis almost a decade ago, suggesting job cuts may be on the way over the summer.

    The barometer（晴雨表）of hiring sentiment comes as Britain's factories unexpectedly recorded the sharpest drop in output for more than five years in April. Pointing to fewer orders for steel used in infrastructure（基础设施）projects and a wider slowdown in demand for British goods at home and abroad, the Office for National Statistics said manufacturing output fell by 1.4% in April from the previous month. Economists had forecast modest growth of 0.3%.

    Although the situation does not appear to be as severe this year, forecasts issued by the National Institute of Economic and Social Research on Monday suggest the UK has done little to bounce back from heavy snowfall earlier in 2018. Putting the growth rate for GDP at only 0.2% in the three-month period to May, up from 0.1% in the same period ending in April, Niesr's head of UK macroeconomic forecasting, Amit Kara, said: “Economic growth has slowed materially since the start of this year and it continues to remain weak.”

    When a child is told he is "uncool", it can be very painful. He may say he doesn't care, and even act in ways that are different from cool on purpose(故意地）. But these are simple ways to deal with sadness by pretending it's not there.

    Helping a child feel better in school had to be careful. If you say, "Why are you worried about what other children think about you? It doesn't matter!" Children know that it does matter. Instead, an active way may be best. You could say, "I'm going to do a couple of things for you to help you feel better in school."

    If a boy is having trouble making friends, the teacher can help him. The teacher can arrange things so that he has chances to use his abilities to contribute to class things. This is how the other children learn how to value his good qualities and to like him. A teacher can also raise a child's popularity in the group by showing that he values that child. It even helps to put him in a seat next to a very popular child, or let him be a partner with that child in activities, etc.

    There are things that parents can do at home, too. Be friendly when your child brings others home to play. Encourage him to invite friends to meals and then serve the dishes they consider "super" .When you plan trips, picnics, movies, and other shows, invite another child with whom your child wants to be friends.

    What you can do is to give him a chance to join a group that may be shutting him out. Then, if he has good qualities, he can start to build real friendship of his own.

    TRAIL SAFE! is a unique safety training program designed specifically for National Park Service (NPS) Trail Volunteers, but is useful to everyone! It's based upon NPS Operational Leadership Training, where the human factor of safety is explored. TRAIL SAFE! captures (捕捉) the core learning objectives of the 16-hour Operational Leadership course while allowing volunteers to learn from their own homes online.

    The TRAIL SAFE! series includes eight video lessons, each ranging in length from 18 to 40 minutes long. Watch them over the course of multiple days, or "binge watch" the entire series in three hours—it's up to you—but please watch them in order from Lesson 1 through Lesson 8. After viewing the lessons, send your training verification (验证) emails to register your participation. When you have viewed and registered for all eight individual lessons, each participant will receive a TRAIL SAFE! pin and a SPE/GAR card in the mail for use in the field. Thank you for helping to make Sleeping Bear Dunes one of the safest work environments for NPS Trail Volunteers like yourself.

    Ready to start?

    Click on this link to access all TRAIL SAFE! videos: https://www.nps.gov/iatr/trail-safe.htm

    If you require Audio Descriptive versions of TRAIL SAFE! the link to those videos is also available on the Ice Age Trail site.

    Record your participation

    In order to receive credits for your participation, please fill in your answers to the following questions and email to: Matthew mohrmannps.gov.

    Which video lesson did you just complete viewing?

    Name of the Trail where you volunteer.

    Your name and full mailing address, so we may send your course completion materials to you.

    Names and addresses of others if you are viewing this lesson in a group setting.

    Optional: Please let us know any comments or suggestions you have about this lesson.

    Upon registering your completion for the entire eight lesson series, you'll receive your TRAIL SAFE! pin and risk assessment card via mail.