Harvard researchers have created a tough, low-cost, biodegradable (可生物降解的) material inspired by insects' hard outer shells. The material's inventors say it has a number of possible uses and someday could provide a more environmentally friendly alternative to plastic. The material, made from shrimp ('虾) shells and proteins produced from silk, is called "shrilk." It is thin, clear, flexible and strong.

    A major benefit of the material is its biodegradability. Plastic's toughness and flexibility represented a revolution in materials science during the 1950s and '60s. Decades later, however, plastic's very durability (耐用性) is raising questions about how appropriate it is for one-time products such as plastic bags, or short-lived consumer goods, used in the home for a few years and then cast into a landfill where they will degrade for centuries. What is the point of making something that lasts 1,000 years?

    Shrilk not only will degrade in a landfill, but its basic components are used as fertilizer(肥料), and so will enrich the soil.

    Shrilk has great potential, the inventors said. Materials from which it is made are plentiful in nature, found in everything ranging from shrimp shells, insect bodies to living plants. That makes shrilk low cost, and its mass production possible should it be used for products demanding a lot of material.

Work on shrilk is continuing in the lab. The inventors said the material becomes flexible when wet, so they're exploring ways to use it in wet environments. They're also developing simpler production processes, which could be used for non-medical products, like for computer cases and other products inside the home. They're even exploring combining it with other materials, like carbon fibers, to give it new properties.

    Driverless technology will soon enter another major global industry: shipping. Several companies recently announced plans to start self-sailing ships to improve safety and efficiency（效率）.

    One of them is Norwegian chemical company Yara International. Yara has designed to build an autonomous ship expected to start next year. The ship is fully electric to reduce air pollution. It is designed to carry containers normally transported by truck. This means the ship will also improve road safety by replacing about 40,000 truck trips a year.

    Yara plans to operate the ships by remote control beginning sometime next year. By 2020, the ships should be loading and sailing themselves. Another company focusing on self-sailing ships is the world's largest mining company, Australia's BHP Billiton. The company's Vice President of Freight, Rashpal Bhatti, recently spoke about the technology. He said, “I believe automation（自动化）will be one of the biggest changes for shipping in the future.” Autonomous ships offer important chances to improve safety and provide better efficiency results to the marine supply chain. He added that self-sailing ships could become a reality within the next decade.

    Rolls-Royce, the British automobile and engine manufacturer, is also developing unmanned shipping technologies. Oskar Levander is the company's head of marine operations. He told a conference last year, “This is happening. It's not if, it's when.” Several shipping companies have invested hundreds of millions of dollars to develop self-sailing ships expected to be used by 2025. These ships will be equipped with technology to collect weather and sea data. They will then use the data to plan out the safest, shortest and most fuel-efficient route.

    In Scotland, 600,000 tonnes of food are thrown away every year. This amount of food, which could as feed about 1.2 billion poor people, is almost a third of household (家庭) waste. And food waste isn't just a big problem in Scotland.

    Money time, and resources (资源) are often wasted by throwing away good food. It also causes very harmful greenhouse gas, which is perilous to the planet.

    In the production stage, some foods do not enter the food chain for many reasons. Supermarkets usually care about the quality of food from farms. They often refuse strange-looking and unusually sized produce. However, they seem to forget that it is almost impossible to grow the perfect produce. Food waste at the consumption (消费) stage includes food going out of date and leftovers (剩饭) because of too much food. In households, even mostly fresh fruit and vegetables are thrown away.

    In order to reduce food waste, here is what we can do:

    Understanding the terms “use by” and “best before” dates. “Use by” dates are there for your safety. It is dangerous to eat food after the use-by date and doing so risks your health. “Best before” dates tell you how long the food will be at its best quality. Once the food passes the date, it isn't necessarily bad, but you should still check, just to be sure.

    Every time you go shopping and you bring back new food, put them at the back of your fridge and bring the food that will expire (到期) soon closer to the front. That way, you know what needs to be eaten first.

    If you have any food that will expire soon, give it to charity if you aren't going to eat it. They will really appreciate the food you have given.

    “The world feels anxious and divided, and Facebook has a lot of work to do whether it's protecting our community from abuse and hate, defending against interference by nation states, or making sure that time spent on Facebook is well spent,” Zuckerberg wrote on Facebook in January.

    If the tech firm succeeded, Facebook would end 2018 on a much better path. But the cracks in Zuckerberg's social media empire only grew as scandals(丑闻)about data misuse, security and even Facebook's leadership piled up.

    The social network has faced criticism many times since launching 14 years ago, but the public uproar reached new heights in 2018. Facebook's missteps, even as it tried to fix its problems, were yet another reminder of what happens when a company grows rapidly with little oversight(监管). They also set the stage for another showdown between the tech powerhouse and lawmakers who have their own ideas on how to manage a platform used by 2.3 billion people every month.

    “I think there's just a general growing consensus from both parties in Congress that self-policing is not going to work,” Democratic senator Mark Warner of Virginia said in an interview. Facebook pointed to a series of notes Zuckerberg published this year outlining what the tech firm has done to combat(战斗，争论)election meddling(好干预的), as well as hate speech, misinformation and other offensive content. The social network pulled down more than 1.5 billion fake accounts, launched a database of political ads and announced the creation of a Supreme Court like independent body to oversee content appals.

    But in many ways, Zuckerberg fell short of his New Year's resolution(决议). UN investigators said Facebook played a role in spreading hate speech that fueled ethnic cleansing(清洗)in Myanmar. Media outlets found loopholes(漏洞)and errors in Facebook's political ads database. Users questioned whether they should delete Facebook after learning that Cambridge Analytical, a UK political consulting firm with ties to Donald Trump's 2016 presidential campaign, gathered data on as many as 87 million Facebook users without their permission.

    In short, Facebook's problems ballooned out of the company's control.

“They created a platform where sharing was mindlessly easy and interacting with each other required almost no forethought at all,” said Woodrow Hertzog, a law and computer science professor at Northeastern University. “As a result, there was massive sharing, including leaking of personal information that put lots of people at risk.”

    What's best to read this year?

    Secrets I Know (Random House Children's Books, ages 3-7)

    This tale written by Kallie George and pictured by Paola Zakimi follows a young girl and her little friend as they move from rain to sunshine, from pleasant loneliness to sweet friendship, and finally from adventures on earth to an exploration of the sky above. The colors of Zakimi's pencildrawings are calming and George's poetic text tells her story with simple language.

    Pandora (Clarion Books, ages 3-7)

    The award-winning author Victoria Turnbull tells the story of a little fox Pandora. Pandora lives alone. She makes herself a handsome home, but no one ever comes to visit. Then one day something falls from the sky -- a bird with a broken wing. Little by little, the bird helps Pandora feel less lonely. Turnbull's watercolor and colored pencil drawings make this story of friendship and growth an atmospheric delight.

    Prince and Pirate (G.P. Putnam's Sons Books for Younger Readers, ages 5-8)

    A different kind of friendship is described in this book, by Charlotte Gunnufson with pictures by Mike Lowery. Prince and Pirate are a pair of mismatched fish put into the same aquarium（水族馆). At first it seems that they'll never learn to be friends. It's only when both take pity on a frightened dogfish that they learn the benefits of cooperation, and soon all three fish become good friends.

    The Giant Jumperee (Dinal Books, ages 3-5)

    The story was written by the award-winning British author Julia Donaldson. When Rabbit hears a loud voice bellowing（吼叫）threateningly from inside a cave, he gathers Cat, Bear and Elephant to help him decide what to do. But it's Mama Frog who fearlessly confronts（面对）the unknown creature. Helen Oxenbury's soft watercolors creat a beautiful countryside and her characterizations of the animals are impressive.

It was not until photographer Rita Nannini left New York that she grew fascinated by the city's subways. While living in Manhattan for some 15 years in the 1980s and early 1990s, Nannini only commuted (通勤) on the one train-given the subway system's bad reputation. But after relocating to New Jersey for several years where subway is not an option, Nannini found that absence did make the heart grow fonder — maybe even for pizza rats. During her visit back to New York, Nannini nodded, noticing improvements in the subway's facilities.

While Nannini was waiting for a train, a bench on the platform opposite caught her attention due to the ever changing faces and characters. They were people of different accents, colors and beliefs. They were from all walks of life, a diverse mix of New Yorkers all there for their own different reasons. Having learned the teenagers' popular "End of the Line" challenge — boarding trains at random and riding them until their final destination; Nannini decided to visit every first and last stop across the NY subway's lines with her beloved camera.

Nannini's "End of the Line" experience saw her traveling some 665 miles across 26 routes in New York city. She took over 8,000 photos of the final stations, as well as the communities they served. In many cases, she rode the routes two or three times over to ensure she got "the shot". "The project really shows me how important the subway is, and how sustainable it makes our lives," she said 

"It's often said that my photos show the end of the lines — the last stops," she said. "But theend of the line is indeed the start for so many people. That made me think about who the people and the communities that live at the two ends are and what it is that the subway means to them."

Nannini was proud of her set of images directly challenging the traditions of story telling, which echoed both the boredom and excitement of travel on tracks.

Nannini enjoyed taking her time, starting her challenge in 2013 and only shooting the final photos last year. Her first monograph on the terminal stops of the NY subway was released in April 2023.

"When you drive in the suburbs, you don't have those encounters," she continued. "People enter your life on the subway. That's what strikes me most on my jouney on tracks."