Last night's meteor (流星) shower left many people in the community dissatisfied and demanding answers. According to Gabe Rothschild, Emerald Valley's mayor, people gathered in the suburbs of the city, carrying heavy telescopes, expecting to watch the brightly burning meteors passing through the sky. What they found instead was a sky so brightened by the city's lights that it darkened the light of the meteors passing overhead.

     “My family was so frustrated,” admitted town resident Duane Cosby, “We wanted to make this an unforgettable family outing, but it turned out to be a huge disappointment.”

    Astronomers—scientists who study stars and planets—have been complaining about this problem for decades. They say that light pollution prevents them from seeing objects in the sky that they could see quite easily in the past. They call on people and the government to take measures to fight against it.

    There is yet a population besides professional and amateur star observers that suffers even more from light pollution. This population consists of birds, bats, frogs, snakes, etc. For example, outdoor lighting severely affects migrating (迁徙的) birds. According to the International Dark-Sky Association, “100 million birds a year throughout North America die in crashes with lighted buildings and towers.”

    Countless more animal casualties (伤亡) result from the use of artificial lighting. Clearly, people enjoy the benefits of lighting their evenings. But some scientists think it can be harmful for humans, too. They worry that exposure to light while sleeping can increase a person's chances of getting cancer.

    Emerald Valley is only one community that is becoming aware of the negative effects of light pollution. For years, Flagstaff, Arizona, has enforced lighting regulations in its city in order to assist astronomers at the Lowell Observatory. Similar efforts have been made worldwide, and a movement is underway to remind us to turn off lights when we are not using them, so that other creatures can share the night.

    Does Fame Drive You Crazy?

Earth's geologic ages—time periods defined by evidence in rock layers—typically last more than three million years. We're barely 11,500 years into the current age, the Holocene. But a new paper argues that we've already entered a new one—the Anthropocene, or “new man”, age.

    The name isn't brand-new. Nobel Prize winner Paul Crutzen, a co-author of the paper, coined it in 2002 to reflect the changes since the industrial revolution. The paper, however, is part of new push to formalize the Anthropocene age.

    Recent human impacts have been so great that they'll result in an obvious boundary (界限 ) in Earth's rock layer, the author's say. “We are so skilled at using energy and exploiting the environment that we are now a defining force in the geological process on the surface of the Earth,” said co-author Jan Zala, a geologist with the University of Leicester in the UK. Even so, it could take years or even decades for the International Union of Geological Science to formalize the new age.

If the concept of the Anthropocene age is to be formalized, scientists will first have to identify and define a boundary line ,or marker, that's set in stone. “The key thing is thinking about how—thousands of years in the future—geologist might come back and actually recognize in the deposit in the UK.” It's not as straightforward as you might think. The market has to be very precise, and it has to be recognized in many different parts of the world,” said Haywood, who wasn't involved in the new study.

One candidate for the market is the distinctive radioactive signature left by atom bomb tests, which began in 1945. “The fallout (沉降 ) is basically across the world,” Haywood said. In a similar way, scientists used traces of the element iridium (铱) left by shooting star strikes to help define the boundary between the Cretaceous and Tertiary periods—the time of the great dinosaur extinctions.

    The push for a formal declaration of the Anthropocene age is about more than just scientific curiosity. The move the scientists write in the last issue of the journal Environmental Science & Technology, “might be used as encouragement to slow carbon emissions and biodiversity(生物多样性)loss” or “ as evidence on protection measures” Just as Haywood said, by underlining how much we're changing the environment, the formalization would be "a very powerful statement”.

    Technology offers conveniences such as opening the garage door from your car or changing the television station without touching the TV.

    Now one American company is offering its employees a new convenience: a microchip implanted (植入) in their hands. Employees who have these chips can do all kinds of things just by waving their hands. Three Square Market is offering to implant microchips in all of their employees for free. Each chip costs $300 and Three Square Market will pay for the chip. Employees can volunteer to have the chips implanted in their hands. About 50 out of 80 employees have chosen to do so. The president of the company, his wife and their children are also getting chips implanted in their hands.

    The chip is about the size of a grain of rice. Implanting the chip only takes about a second and is said to hurt only very briefly. The chips go under the skin between the thumb and forefinger. With a chip in the hand, a person can enter the office building, buy food, sign into computers and more, simply by waving that hand near a scanner. The chips will be also used to identify employees. Employees who want convenience, but do not want to have a microchip implanted under their skin, can wear a wristband (腕带) or a ring with a chip instead. They can perform the same tasks with a wave of their hands as if they had an implanted chip.

    Three Square Market is the first company in the United States to offer to implant chips in its employees. Epicenter, a company in Sweden, has been implanting chips in its employees for a while.

    Three Square Market says the chip cannot track the employees. The company says scanners can read the chips only when they are within a few inches of them. “The chips protect against identity theft, similar, to credit cards.” The U.S. Food and Drug Administration approved the chips back in 2004, so they should be safe for humans, according to the company.

    In the future, people with the chips may be able to do more with them, even outside the office. Todd Westby is Chief Executive Officer of Three Square Market. He says, “Eventually, this technology will become standardized allowing you to use this as your passport, public transit, all purchasing opportunities, etc.”

    Mr. Guo is a teacher from Xi'an. He asked his students to hand in their homework through a QR code (二维码)."We spent an hour or two in class learning how to generate (使产生) the codes, and in the end everything gets easier." Said Guo, "When students finish the homework, they keep it on WeChat. Then, each student makes his own QR code and gives it to me. So I can check their work anywhere using my computer or telephone."

    The QR codes can be sent to Mr. Guo by email, QQ and WeChat. When Guo scans his students' QR codes, their homework appears on his phone. He finds that their homework becomes more creative, with many pictures, music and even videos.

    Guo's students like the new way and think it is interesting. "We are living in the information age. Many students like to work with computers, which makes learning more fun." said Tingting, a student of Guo's.

    "The paper is not easy to keep, but the code is easy to keep and share." Guo said, "It is worth trying to use new technology in education. Education itself is a kind of creation. I don't want my students to fall behind the times."

    However, some parents are worried. They are afraid that their children will spend too much time surfing the Internet and less time communicating with teachers. But in fact, it's unnecessary. Students still need to look up information in books and write it down when they do their homework. They only use the codes when they hand in their work, which doesn't take them too much time. Also for teachers, it allows them to check the students' work at any time. And it's also an easy way to share homework with other students.

    Chinese movie goers set a box office record for the eve of the weeklong National Day holiday on Monday, with takings(票房收入)more than twice the previous record, according to several industry trackers. The major blockbusters(大片)contributing to the box office record were three new releases--My People, My Country, The Captain and The Climbers--which all opened on Monday.

    Industry analyst Wu Nian said more than 80 film companies invested in the three blockbusters, which would provide a substantial boost to the recently lackluster market.

    My People, My Country, a 158-minute anthology that saw seven famous directors join hands, dominated the box office, according to Maoyan(猫眼).

    Consisting of seven short stories set in historic moments to look back at New China's 70years of existence, the movie was codirected by Chen Kaige as well as 6 other directors--who have all directed domestic hits or international award winners.

    Chen, who served as chief director, said China has seen a huge transformation in the past seven decades. As the painstaking efforts of several generations had contributed to the country's achievements, Chen said the team working on the movie had decided to use it to revisit milestone moments through ordinary people's eyes.

    Another highly anticipated film, The Captain, earned 194 million yuan to occupy second place on the box office charts.

    Starring actor Zhang Hanyu, the film is based on heroic Sichuan Airlines pilot Liu Chuanjian, who completed one of the most miraculous emergency landings in China's civil aviation history.

    Also adapted from real events, The Climbers grossed 157 million yuan on Monday. With a stellar cast including Zhang Ziyi and Wu Jing, the film is about Chinese mountaineers' ascent to the summit of Mount Qomolangma, via its perilous north ridge in 1960 and 1975.Wu Jing said the film filled a gap in the market, with sports-themed titles quite rare in the world's second-largest movie market.

    Aside from the three blockbusters, eight other films--covering a wide range of styles from animation to fantasy-will be released during the holiday ending on Oct 7.