Americans are worried about new technology. They are concerned that machines. Including robots, will take over work now done by humans. These findings come from a new report by the Pew Research Center of Washington DC.

    About 75 percent of Americans questioned by Pew said automation will increase income inequality between the rich and the middle class and the poor. And 64 percent of people expect automation to be so common in America that people will face difficulty finding things to do with their lives.

    Some of the concerns about technology come from a distrust about whether machines will always make the right decision. Many Americans believe humans have better judgment in dealing with complex matters. One example is selecting a person for a job. Three quarters of Americans said they would not want to apply for a job that uses a computer program to choose the most qualified person.

    Most Americans want the government to limit automation, For example, 87 percent support a requirement that all driverless vehicles have a human in the driver s scat who can take control when needed. And 85 percent want to limit machines to mostly doing jobs that are dangerous or unhealthy for humans. And only 25 percent expect more jobs to come from automation. Pew said.

    Mark Zuckerberg, the co-founder of Facebook, spoke last May to graduating seniors from Harvard University in Massachusetts, His talk centered on the uncertain future facing young people. “Our generation will have to deal with tens of millions of jobs replaced by automation like self-driving cars and trucks,” Zuckerberg told the graduates,

    Zuckerberg said young people will have to find projects that will bring both jobs and direct benefits to the people of the world. He said in his speech that 300,000 people worked to put a man on the moon, and millions of people built, the Hoover Dam as well as other great projects over the last 100 years.

    This could be the perfect gift for the partner, who embarrasses you on the dance floor. Smart socks, which can teach to dance, may be the answer for anyone with two left feet.

    The socks have been developed as a running tool to help runners improve their skills. Thanks to the socks, users can accurately record not only how far and fast they run but also how well. It means the user maximizes their performance, and reduces damage to body and prevents hurt. The hi-tech socks are made of special fibers that watch the movements of your feet. They look, feel and can be washed like normal clothes.

    Sensors（传感器）record each movement and send it by an ankle transmitter（脚踝发射器）to a smart phone.  Then a "virtual coach" application shows the information and can tell the user what they are doing wrong, and help to improve skill in any task with feet.

    The socks should be useful to athletes and weekend joggers. "People think running is so easy and of course everybody can do it but not necessarily safely and well, "Dr Davide Vigano said. A recent study showed that between 60 and 80 percent of runners got hurt per year. This is pretty much more than any other human activity. Researchers say the technology can also be developed to teach people how to dance, play sports such as golf, or even to help to teach women to walk better in high heels.

    Mr. Vigano said, "People could all benefit from the idea. We have had interest from all sorts of sports, like skiing, football, cycling and golf. Anything where you have to use your feet can use it. It could even be put in high heels to help women walk in them safely. "

    Socks are just the start, and the technology could be used in gloves, hats and boots. The socks, anklet and software package, are expected to be sold for around￡120, which will go on sale in March.

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    So what is rewilding?

    Imagine our natural homes growing instead of shrinking. Imagine species (物种) diversifying instead of declining. That's rewilding. Rewilding is ecological restoration. Rewilding offers hope for wildlife, humans and the planet.

    Why is rewilding important and necessary?

    Our natural ecology is broken. The places where you would expect wildlife to exist have been reduced to wet deserts. The seabed has been destroyed and there have been no living creatures any more.

    Our wildlife is disappearing. Many wonderful species have declined over the past century. We've lost more of our large animals than any European country.

    We need keystone species. These vital species, including top predators (食肉动物), drive ecological processes. Their loss has worsened our living systems.

    Nature looks after us. Good natural ecology can provide us with clean air and water, prevent flooding and store carbon. Rewilding can leave the world in a better state than it is today.

    What are challenges?

    As a long-term project, our "rewilding britain" has its challenges. Many people are not interested, because we have got used to the lack of native forests. Many farmers oppose the idea. They thought it a crazy idea to bring back predators because they would start killing farm animals. It takes time to educate them. Above all, we need money! So we need your help!

    Make a donation.

    Help us bring back living systems and restore wild nature!

With your help we can…

    Open up new chances for rewilding and push for change.

    Develop tools to educate, influence and spread the word.

    Thanks for your support.

    While the start of a new school year is always exciting, this year was even more so for some elementary school students in Auckland, New Zealand. They became the world's first kids to be "taught" by a digital teacher. Before you start imagining a human-like robot walking around the classroom, Will is just an avatar that appears on the student's desktop, or smartphone screen, when ordered to come.

    The autonomous animation platform has been modeled after the human brain and nervous system, allowing it to show human-like behavior. The digital teacher is assigned to teach Vector's "Be sustainable with energy" — a free program for Auckland elementary schools.

    Just like the humans it replaced, Will is able to instantly react to the students' responses to the topic. Thanks to a webcam and microphone, the avatar not only responds to questions the kids may have, but also picks up non-verbal cues. For instance, if a student smiles at Will, he responds by smiling back. This two-way interaction not only helps attract the students' attention, but also allows the program's developers to monitor their engagement, and make changes if needed.

    Nikhil Ravishankar believes that Will-like avatars could be a novel way to catch the attention of the next generation. He says, “I have a lot of hope in this technology as a means to deliver cost-effective, rich, educational experience in the future.”

    The program, in place since August 2018, has been a great success thus far. Ravishankar says, " What was fascinating to me was the reaction of the children to Will. The way they look at the world is so creative and different, and Will really captured their attention." However, regardless of how popular it becomes, Will is unlikely to replace human educators any time soon.

    Simpson is 53, "not sporty" and has suffered from asthma all her life. Two years ago her son Jay, now 10, took up BMX (自行车越野赛). "I enjoyed watching him and thought I'd like to try it," Simpson recalls. "But I didn't want to embarrass myself. I hadn't ridden for over 40 years."

    Then she noticed a session for women and girls at Burgess Park BMX Track in Peckham, south-east London, where Jay trained. This season Simpson raced at the London BMX series and finished third in her category.

    "It was the most worrying experience of my life. But it was also exhilarating," she says cheerfully. "My son is proud of me. We now share a real love for the sport. It has brought us closer together."

    Since becoming part of the Olympic Games in 2008, the popularity of BMX has risen. A program introduced in London in 2011 by the sports development charity Access Sport has seen tracks built in several London regions, backed up with investment in coaching, and the program is being rolled out to Bristol.

    Wright's children Skye, 11 and Xander, 10 are sponsored riders who have represented Great Britain in every world championship since 2014. Wright says she was motivated to start BMX herself out of an interest aroused by watching so much of it. "It's an eye-opener to share your children's interests," she explains. "You comprehend what they go through in a much more direct way. It adds another dimension to your relationship."

    It is also a high-impact sport and the risks are fairly obvious. "I totally get the fear," says Emma, 51, a BMX exercise coach and cycling instructor. "It's the fear of doing something new, of getting hurt. But I say 'Come and give it a try.' The chance of having an accident is slim, and you can spend time on the flat to improve your confidence."

A kind of blue dye (颜料) called folium had been widely used to paint pictures on the pages of manuscripts (手稿) created in the Middle Ages. But long ago, this watercolor fell out of use.

"Manuscripts are an important part of the cultural works of art in the Middle Ages," said scientist Maria in an email to CNN. "Color is a basic feature of these manuscripts. To let ancient manuscripts. keep a good condition for future generations, we sometimes need to repaint their inside pictures through the ancient dye — like folium — that was once used in these manuscripts. But everyone who knew how to prepare folium had died long ago. So 'I led a team to study this dye."

Her team turned to books from the 1400s and found one that described the plant that was its source. It is a tiny plant with silvery-green leaves. Days later, the scientists reached a village in south Portugal, where nobody knew this little plant. However, after carefully going through a plenty of different plants growing there, the scientists finally raked out the plant they wanted and brought some back to their laboratory.

Back in the lab, the scientists produced the dye with the help of an ancient text on colors. The text has clearly described the ways to make it. "It's cool to have done that work of looking in the historical records and traveling back in time," says Casadio, who was not part of this study. It recreates an ancient process. By making the dye, the scientists could study its chemistry without experimenting on priceless delicate (易损的)  works of art, she points out.

Now, the researchers don't know the dye's stability(稳定性)and its ability against the environment that may wear and break it down over time. "To know such information is necessary if we desire to make these colors last long enough," Maria said. "So our study will continue."