You can tell a lot about people by looking at their hair – not just whether they brush, spray or blow-dry. Scientists have found a way to use hair to figure out where a person is from and where that person has been. The finding could help solve crimes, among other useful applications.

    Water is central to the new technique. The liquid makes up more than half an adult human's body weight. Our bodies break water down into hydrogen(氢) and oxygen. Atoms of these two elements end up in our tissues, fingernails, and hair.

    But not all water is the same. Hydrogen and oxygen atoms can vary in how much they weigh. In the case of hydrogen, for example, there are three types according to their weights. Each type is called a hydrogen isotope（同位素）. And depending on where you live, tap water contains different isotopes.

    Can hair record this information? That's what James R. Ehleringer, an environmental chemist at the University of Utah, wondered. To find it out, he and his colleagues collected hair from hair stylists in 65 cities across the United States. Even though people drink a lot of bottled water these days, the researchers have found that people's hair has the same isotopes as found in local tap water. That's probably because people usually cook their food with the local water.

    Authorities can now use the information to analyze hair samples from criminals or crime victims and narrow their search for clues. For example, one hair sample used in Ehleringer's study came from a man who had moved from San Francisco to Salt Lake City. As his hair grew, it reflected his change in location.

    Kay and Charles Giddens sold their home to start a bed and breakfast. Four years later, the couple now dishes out banana pancake breakfasts, cleans toilets, serves homemade cookies to guests in a bed and breakfast surrounded by trees on a mountain known for colorful sunsets.

    “Do I miss the freeways? Do I miss the traffic? Do I miss the trees? No,” says Ms. Giddens. “This is a phenomenon that's fairly widespread. A lot of people are rethinking their lives and figuring out what they want to do.”

    Simple living ranges from cutting down on weeknight activities to sharing housing, living closer to work and commuting(通勤) less, avoiding shopping malls, borrowing books from the library instead of buying them, and taking a cut in pay to work at a more pleasurable job.

    Vicki Robin, a writer, tells us how she deals with the changes in her budget, now far less than what she used to make.

    “You become conscious of where your money is going and how valuable it is,”Ms. Robin says. “You tend not to use thing up. You cook at home rather than eat out. You find your life is not a mess anymore, and you discover your living costs have gone way down.”

    Janet Luhrs, a lawyer, quit her job after giving birth and leaving her daughter with a babysitter for two weeks.“It was not the way I wanted to raise my kids,”she says.“Simplicity is not just about saving money ; it's about me sitting down every night with my kids to a candlelit dinner with classical music.”

    Ms. Luhrs now edits a magazines called Simple Living, which publishes tips on how to buy recycled furniture and shoes, and organize potluck（家常便饭）dinners instead of fancy receptions.

    “Simplicity is about conscious living and creating the life you want. The less stuff you buy, the less money goes out the door, and the less money you have to earn,” Ms. Luhrs explains.

    Last Friday, after doing all the family shopping in town I wanted a rest before catching the train, so I bought a newspaper and some chocolate and went into the station coffee shop. It was a cheap self-service place with long table to keep a place and went to get a cup of coffee.

    When I came back with the coffee, there was someone in the next seat. It was one of those wild-looking boys, with dark glasses and old clothes, and his hair was colored bright red at the front. What did surprise me was that he'd started to eat my chocolate.

    I was rather uneasy about him, but I didn't want to make more trouble. I just looked down at the front page of the newspaper, tasted my coffee and took a bit of chocolate. The boy looked at me closely. Then he took a second piece of chocolate. I could hardly believe it. Still I didn't say anything to him. When he took a third piece, I felt angrier. I thought, well, I shall have the last piece. “And I got it.”

    The boy gave me a strange look, and then stood up. As he left he shouted out, “There is something wrong with the woman,” Everybody looked at me, but it was worse then I finished my coffee and got ready to leave. My face turned red when I knew I'd made a mistake. I wasn't my chocolate that I had eaten. There was mine, just under my newspaper.

    Podcasts (播客)

    The B S. Report

    Designed for the sports fan with a sense of humor, the B.S. Report is hosted by the sportswriter Bill Simmons. Simmons show is in very loose and free form and it's not uncommon for him to go almost a whole show without even mentioning sports.

    Wait, Wait…… Don't Tell Me

    One of the most popular Programs on National Public Radio, Wait. Wait... Don't Tell Me is now available as a podcast. The show is a news program in the form of a game show. Each week a group of humorists and writers join host Peter Sagal in Chicago, where they are quizzed on the weeks most important and funny news stories. Listeners also get to call in to play different news-related games for a prize

    The Moth

    The Moth is a weekly podcast run by a nonprofit art organization. The show is made up of recordings of “true stories told before a live audience without notes”. Each week, the group releases short 10-20 minute tales told by people from all walks of life. Past Presenters have included writers, comedians, scientists, and even New York City police officers.

    Film spotting

    Film spotting is a weekly podcast and is a must-listen for any movie fan. The show is focused on movie reviews, but hosts Adam Kempenaar and Matty Robinson do more than just tell their listeners which new movie is worth seeing. They also discuss and examine the film as an art form. The how doesn't just focus on current movies, either, as the hosts frequently discuss old films as part of theme marathons.

    Franz Boas was born in Minden, Germany, in 1858. After studying at the Universities of Heidelberg, Bonn, and Kiel, he received a doctor's degree in physics from the University of Kiel in 1881. His first fieldwork experience was among the Eskimo in Baffinland, Canada, in 1883-1884. In 1886, on his way back from a visit to the Kwakiutl Indians of British Columbia, Canada, he stopped in New York and decided to settle.

    Boas's first teaching position in America was at the newly founded Clark University in 1888. Eleven years later, he became professor of anthropology(人类学) at Columbia University. From 1896 to 1905 he was also curator(馆长) of anthropology at the American Museum of Natural History in NY. There he organized and took part in the Jesup North Pacific Expedition of 1902, which suggested the possibility of a strong relationship between northern Asian and northwestern Native American cultures. After guiding the Columbia Anthropology Department for 41 years, Boas became Professor Emeritus(荣誉退休教授) in 1937.

    Boas's anthropological studies have become classics in the field. He showed the necessity of studying a culture in all its aspects, including art, history, dance, language as well as the characteristics of the people. He pointed out that the differences in peoples were the results of historical, social and geographic conditions and all populations had complete and equally developed culture. He argued that no truly pure race exists, and that no race is superior to any other.

    In 1911 Boas published the Mind of Primitive Man, a series of lectures on culture and race. In the 1930s the Nazis in Germany burned the book. Boas revised the book in 1937 and put his anthropological ideas about racism into popular magazine articles. In 1942, Boas died, having founded anthropology as a recognized social science.

    Photos of eight-year-old Wang Fuman, nicknamed by “Snowflake Boy” in Yun Nan, shared by his principal on Tuesday, showed the boy has a red face from the low temperatures and apparently did not wear enough clothes to keep warm. He also suffered from frostbite. He stood alone with his white hair and eyebrows while other classmates behind were clearly amused and laughing. The picture drew widespread attention around the whole world. Many netizens (网民) were sympathetic to the boy's difficulties, with many Mircoblog users giving comments under the report.

    Just after the report, a donation of 100,000 yuan was sent to his Primary School. Constantly, help still pours in for the Chinese boy. But the local authorities call on others to pay attention to other similar rural areas and give them timely aid. In China, there are still so many children just like Fuman living by himself with parents migrating to cities to make a living.