New mercury(汞) threat to oceans from climate change

    Rising temperatures could boost mercury levels in fish by up to seven times the current rates, said Swedish researchers in an article published in Science Journal. They've discovered warming increases levels of the toxin (毒素) in sea creatures. In experiments, they found that extra rainfall drives up the amount of organic material flowing into the seas. This alters the food chain, adding another layer of complex organisms which boosts the concentrations of mercury up the line.

    Mercury is one of the world's most toxic metals, and according to the World Health Organization, is one of the top ten threats to public health. The substance at high levels has been linked to damage to the nervous system, paralysis and mental impairment in children.

    The most common form of exposure to mercury is by eating fish containing methylmercury(甲基水银), an organic form of the chemical which forms when bacteria react with mercury in water, soil or plants. Levels of mercury in the world's ecosystems have increased by between 200% and 500%, since the industrial revolution say experts, driven up by the use of fossil fuels such as coal.

    In recent years there have been concentrated efforts to limit the amount of mercury entering the environment, with an international treaty, called the Minamata Convention, signed by 136 countries in place since 2013.

Researchers hope that the Minamata treaty will be successful and countries reduce the amount of mercury that is being produced. Otherwise this discovery of a previously unknown source could have impacts for human health.

    Other researchers in the field say that the new study highlights important issues that have previously been little known.

     “This work experimentally proves that climate change will have a significant effect of methylmercury budgets in coastal waters and its accumulation in fish,” said Milena Horvat from the Jozef Stefan Institute in Slovenia.

     “This work will also help us understand the formation of mercury in fish and help reduce mercury from emission sources (primarily industrial).”

    Joanna Cole, born on August 11, 1944 in Newark, New Jersey, has been credited to be one of the most popular children's authors of all time. She has written over 250 books and is famous for writing one of the most popular children's book series. She knew as early as 5th grade that she was interested in writing and science. Cole has owed a large part of her passion to one of her elementary school teachers.

    Joanna Cole continued her education by attending the University of Massachusetts and Indiana. She would eventually earn a bachelor's degree in psychology from the City College of New York in 1967; after graduation Cole decided to take some education courses to become a librarian at a Brooklyn elementary school in 1967. Eventually, she would take jobs working for Newsweek, Seesaw book club.

    Cole's passion for writing and science was still alive and well during this time. In 197l she decided to write her first book, Cockroaches. She did some research and discovered there had never been a book written for children about cockroaches. So she thought she would be the first.

    Cole struck gold when she wrote the first Magic School Bus in 1985. The book would go on to be published the following year and quickly became book series and cartoon series due to its success.

    Cole continued to write both non-fiction and fiction books for children. She writes in a way that will hopefully inspire children to think like a scientist. She does this by writing ideas instead of just facts. She also tries to ask questions in her books that require children to think and discover the answers as they read. This creates an engaging experience for children, so it is no wonder why younger readers are hooked on her books.

    “Oh，my god.Are you serious?”

    That's a reaction I often get when people hear the tale of my childhood.

    It's a story I don't often share.Growing up in a bad home, I learned to protect myself by not speaking up.I've seldom said anything about how badly I was treated and hurt as a child. I don't talk about how my name was changed at least three times, what it was like to live in my van(箱式货车), or how I've struggled with anxiety, depression, and wanting to kill myself. But I learned to start speaking up for myself. I went on to earn two graduate degrees and I will complete my Doctor's degree this year. I've also become a widely published author. So，how did I get to where I am today?

    What's helped me is surrounding myself with caring, loving people. I've learned day-to-day skills through research, trial and error, and with the help of skilled professionals. They've taught me how to slow down，to breathe，to be thankful for what I've got.They're the ones who make my goals possible.They have also taught me to turn my past experiences into strength-to make the negatives into positives.

    My hope is that sharing my story might help others to see what is possible even in the darkest of times and help others to speak out.I don't think I'm in any way special or unique. I'm a common man，no more deserving than anyone else.But for far too long，I've been afraid that others think I'm damaged goods.I've worried about how I might be treated differently.

    Pain and fear teach us to be silent.It's time for that to change.

    I don't know what tomorrow might bring.But one thing I've learned is that if we can hold on and find help，if we find ways to get through the day and speak up，we'11 not only survive，but become stronger than before.

    Our very survival can be an inspiration all on its own.And with love of my friends，I look forward to so much more than completing my education—I look forward to the future.

    Young people almost never get a good press(评论) these days. “Their outlook is centered on trashy books and films,” expressed one citizen in a letter I recently came across in the Daily Mail. It seems that people have been complaining about the young since ancient times. However, the young are probably no worse than they've ever been. And I think they're better. Teenagers today are brighter, more energetic, more outgoing, and more interesting than any generation before.

    The truth is, we hear plenty of bad news about youth, but we never hear about the majority. Surely they all want to be footballers or attractive models? Not a bit of it. When research company Britain-Thinks examined teenagers attitudes earlier this year, they found that the most popular goal (shared by some 70 percent) was to “have a job you love”, followed by having a university degree, owning your own home and being in a happy, long-term relationship. It tallies with another study by the Institute for Economic and Social Research, which found that what made teenagers happiest wasn't a new smart-phone or pair of shoes, but “the simple things in life” such as close friends, going swimming and spending time with their parents.

    Indeed, the more you look at the young, the more impressive they seem. They are, of course, more technologically knowledgeable and skillful than any generation before them. But the interesting thing is that they're not merely consumers; they're creators. Think of all those young people developing their own websites or machines.

    Seventeen-year-old Nick D'Aloisio is an example. He invented a news-summary app (应用程序)called Summly and sold it to Yahoo this year for a reported £18 million. The company offered him a job in California, but he turned it down. “I'll be staying in London,” he explained. “I want to finish my A levels and I couldn't really live on my own out there.”

    Of course they aren't perfect, and every generation has its fair share of bad apples. But I think our future is in safe hands.

    You might not get what you wish for, but you always get what you work for. I want to be a professional ballerina(芭蕾舞者) with the American Ballet Theatre in New York when I grow up, and I work toward my dream by training over 18 hours a week. I even started homeschooling so I could make more time for dance. I love dancing more than anything. It makes me feel strong and invincible(不可战胜的), like nothing could ever bother me. Most important, it's helped me deal with the most difficult event of my life — the death of my dad when I was seven.

    My dad died of a heart attack while playing hockey, his favorite sport. When my mom first told me, it didn't hit me that I would never be able to see him again. It was also hard to tell my friends and classmates because I didn't know what to say, and they never knew how to respond. But four years later, everything that I do, I do in memory of my dad. I did my first dance solo. “The Love Lives On.” to him when I was nine.

    I would have never gotten through the experience without my mom. She comforted me when I was in grief and pain, and we wrote down all the memories I had with my dad in a special book. Now that I'm older, my mom and I do get on each other's nerves more often — for a while, my schedule was very busy and we were so stressed that our little miscommunications would rise into huge arguments. But after we attended counseling(心理咨询) and I started homeschooling, things got much better, and now my mom and I have more quality time to spend together.

    I've learned that talking and communicating are the most important things to do in any relationship, and that definitely includes friendships, too! When I hang out with my friends, I try not to look at my phone. It's so awkward(尴尬的) when you're sitting at a table with someone else, and she's texting instead of talking to you. I think a good friend is kind, respectful, fair, and funny — and I'll always try to be all of these things in person, not just on the phone!

    Plastics remain one of the most - used materials for making many things. Things made of plastics can be very strong and last a long time. Plastics are also much lighter than metal and can easily be formed into different shapes. Plastics can take hundreds of years to break down on their own. And very few kinds are highly recyclable.

    A team of researchers working at the US Department of Energy says it has created a kind of plastic that could lead to products that are 100 percent recyclable. It recently reported the discovery in a study in the journal Nature Chemistry.

    The researchers say the new material is a plastic polymer (聚合体)called polydiketoenamine, or PDK. The team reports the material can be broken down in parts at the molecular (分子的)level. It can then be built up again to form plastics of different shapes, textures and colors. The researchers say this process can be repeated over and over again—without the plastic material losing any performance or quality.

    "Most plastics were never made to be recycled," lead researcher Peter Christensen said in a statement. " But we have discovered a new way to assemble plastics that takes recycling into consideration from a molecular perspective. "

    Many plastics have different chemicals added to them to make them more useful and powerful. The problem is that these chemicals attach to the monomers (单体), which remain in plastics even after the material gets processed at a recycling plant. The research team reported that, with the newly discovered PDK material, the monomers could be recovered and separated from any chemical additives.

    Next, the researchers plan to develop PDK plastics "with a wide range of thermal and mechanical properties. These plastics could be used for many kinds of cloth, as well as things such as 3D printed materials and foams. In addition, the team is trying to include plant - based materials in the process.