As we know, DNA testing is very useful for crime fighting. But now crime fighters could have a new tool at hand. Researchers have developed a cutting-edge (前沿的) technique to identify human hair. Their test is quicker than DNA analysis techniques currently used by the police.

    DNA testing is commonly used for identification because DNA is unique to each individual. However, environmental and chemical processes can degrade(降解) DNA, limiting its usefulness over time. Protein (蛋白质) in hair, on the other hand, is more stable than DNA but can also have variations (变异体) that may be unique to the individual.

     “Our analysis process can be used universally,” says Ms. Huang, “One of our samples even included dyed hair and the test was 100 per cent accurate. The test was able to distinguish East Asians, Caucasians and South Asians.”

    Dr. Beauchemin says she has got in touch with law enforcement agencies about using the new technology. She is also planning to collect more hair samples and continue her research with a goal of finding where exactly in the world hair sample is from, to look for more races and determine specific age.

     “We are in a very similar place with protein-based identification to where DNA testing was during the early days of development,” said chemist Brad Hart. “This method will be a game-changer, and while we've made a lot of progress toward improving it, there are steps to go before this new technique is able to reach its full potential.”

    "How to Let Co of the World and Love All the Things Climate Can't Change" is the latest movie from film-maker and climate activist Josh Fox.The movie is the third film in a three-part series about climate change.

    In 2010,Fox's documentary "Gasland" was appointed for the highest award-an Oscar. "Gasland" explored the hotly debated process of removing natural gas from the ground.He examined the subject again in "Gasland Ⅱ".

    Fox was in Washington,D.C.recently to present his third film.He was arrested during a protest against a new fuel pipeline.In the film,Fox says pollution from fossil fuels must be reduced.Without limits,there will be more extreme weather,like severe storms and dry weather,rising sea levels,causing shortages of food and water, "When you really encounter that head on,it causes an in-credible crisis."

    In the new film,Fox travels through a sunless forest in the Amazon with local activists to measure oil spills.He goes to a village in Ecuador to learn how people there stopped a pipeline from being built.He joins young people in Australia to stop boats from entering the port of Newcastle.

    "You should probably know the downside of what we're about to do.This is the short list: drowning,being arrested: being run over by boats,drifting away in currents out into the Pacific Ocean,cultural disrespect,big waves."

    Also in the film,Fox talks to Ella Zhou,an energy expert.She explained the importance of what she calls "moral imagination"."I think that it forces us to get out of our box of thinking about,for instance,what is being successful.It allows us to have a moral value about what you want as a person.What do you want to do for the world and for yourself?"

    The summer before my dad died, we moved house. Up until that point, our family had our own space to spread out. Money was tight, so there was no television set, but we owned a turntable on which my dad's records played constantly. Mostly, it played Bob Dylan. Tracks from The Basement Tapes and Desire became an important part of our new life. My brother and I, aged 8 and 10，climbed trees, built hideaways and learned the words of Clothes Line Saga. We would chant over and over, lost in our own joy.

    It was January when my dad left us forever because of the cancer. He was 36 going on 37 then, the same age as Dylan. Afterwards, our laughter disappeared, but we kept on playing the records, which became our only ritual of remembrance. The two men became so intertwined in my head, I struggled to tell them apart.

    Dylan was my dad's gift to me. What child wouldn't be fascinated by songs full of pirates and seasick sailors? How did it feel to have No direction home? Farewell, Angelina became my party-piece. I would sing this at church cheese and wines to the assembled audience. A lot of donations were made.

    Growing up, I remained a fan of the music, but I wasn't obsessed with Dylan until one day in early 1995, my brother bought us both tickets to see him play at Brixton Academy. London felt like a long way to go. But finally seeing Dylan step out on to the stage brought a sudden rush of excitement.

    I have seen Dylan a couple of times since. My brother is not around so much these days. But he was up for a visit recently. We passed a happy evening laughing and drinking, while his son, aged nine, performed his party—piece Subterranean Homesick Blues for us. He sang it word-perfect. And so it goes on: Dylan's music as a gift, passed down the generations.

    To above prices, please add $3 for first book and $1 for each additional book for postage & handling. Foreign countries add $5 per book. Send orders to Quackwatch, P. O. Box 1747, Allen Avenue, NY 18105. The checks must be in US dollars. We cannot process credit card orders. Please use our order form from Amazon.com and include your email address.

    Make Money This Summer with Sunny Libraries!

    Do you have too much free time this summer vacation? Do you need a summer job to earn extra money? Do you want to be involved in your community? Sunny Area Library System (SALS) has job opportunities for high school students. These are good chances to get work experience.

A tiny Alaska village has experienced a boom in tourism in recent years as polar bears spend more time on land than on Arctic sea ice.

More than 2,000 people visited the northern Alaska village of Kaktovik in 2018 to see polar bears in the wild. The far north community lies in an area where increasingly higher temperature has sped up the movement of sea ice, the primary habitat of polar bears. As ice has gradually moved to deep water beyond the continental shelf, more bears are remaining on land to look for food.

Polar bears have always been a common sight on sea ice near Kaktovik, but villagers started noticing a change in the mid-1990s. More bears seemed to stay on land, and researchers began taking note of more female bears making homes in the snow on land instead of on the ice to raise their babies. U.S. Fish & Wildlife Service biologists began hearing reports of the increasing number of polar bears in the area in the early 2000s. As more attention was given to the plight of polar bears about a decade ago, more tourists started heading to Kaktovik.

 "The village had fewer than 50 visitors annually before 2011," said Jennifer Reed, of the Arctic National Wildlife Refuge. "Today we're talking about hundreds and hundreds of visitors, many from around the world each year," Reed said. Most tourists visit in autumn, when bears are forced towards land because sea ice is farthest away from the shore. Bruce Inglangasak, a local hunter who sometimes offers wildlife-viewing tours, said, "I've been offering polar bear tours since 2004." Many tourists stay several days in the village, which has two small hotels. The villagers have benefited a lot from that. In turn, they provide more effective protection for polar bears with financial support from tourism development.