A new study finds that young females in one group of African chimps(黑猩猩) use sticks as dolls more than their male peers (同龄) do, often treating pieces of wood like a mother chimp caring for a baby. In human cultures around the world, girls play with dolls and pretend that the toys are babies far more than boys do.

    Chimp observations, collected over 14 years of field work with the Kanyawara chimp community in Kibale National Park in Ugandan, provide the first evidence of a nonhuman animal in the wild that exhibits sex differences in how it plays. This finding supports an argument that biology as well as society underlies boys' and girls' different toy preferences.

    Stick play occurred most commonly between ages 3 and 9. Females spent a lot more time carrying sticks than males did. Young male chimps occasionally used sticks to mimic(模仿) childcare. "Far more often, they fought with sticks, an infrequent behavior among females," say Sonya Kahlenberg of Bates College in Lewiston, Maine, and Richard Wrangham of Harvard University.

    "Biological differences between the sexes make female chimps more receptive to stick-mothering than males," says Wrangham.

    Consistent with reported cultural traditions among adult chimps, Kanyawara youngsters learned from each other to play with sticks as if caring for babies. Stick play among young chimps showed no evidence of being directly influenced by older chimps. Child-bearing females never played with sticks and thus didn't model such behavior for younger chimps.

    Young females carried sticks for anywhere from a few minutes to several hours. They often rested in nests with their sticks, sometimes playing with them much as chimp mothers play with their babies though they didn't get any form of teaching from the adults.

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Metrorail(地铁）

    Each passenger needs a farecard to enter and go out .Up to two children under age five may travel free with a paying customer.

    Farecard machines are in every station .Bring small bills because there are no change machines in the stations and farecard machines only provide up to $5 in change.

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Metrobus

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    By May, after three months, I had lost22pounds and reached my goal of 115 pounds. My friends would say “Alice, you look great!” or “How did you lose so much weight?” Those compliments made me feel good and confident.

    Soon I dropped to110 pounds. A few of my friends told me that I needed to stop dieting, because I was starting to look sick. They brought me a present—— a bag of chocolates, which I later gave to my sister. My mother would come to my room, with tears in her eyes, and have long chats about how harmful this diet was and begged me to stop. My dad would leave worried messages on my cell phone at school, telling me that it would do serious harm to my body.

    By mid-June, when school was coming to an end, I was down to an only alive state of 95 pounds. All of a sudden, I knew I had to do something. I guessed the number itself scared me. I recalled my doctor. He told me about a girl who was 95 pounds and was at the risk of dying. I knew I was putting my life at risk, but for what? To make those who love me worried? Was it worthwhile to be thin?

    Now I realize that models in magazines, TV and movies are not realistic. The price to pay for the “perfect body” is living with a dangerous and sometimes deadly eating disorder. And there are more important things to think about than how thin you are.

    John J. Lennon, who's currently serving a 28-year life sentence for drug dealing and a murder he committed in 2001. He is one of 23 out of 2,300 inmates(监犯)participating in an education program, and he advocates greater access to education in prison through TV. Currently, he says the TV is used as “an inability tool; it's a tool to keep us entertained cells.” But he suggests that prison TVs should stream online courses instead of movies.

    “If inmates had the chance to watch an online course then they might say, ‘Hey, look what's on Channel 3; it's an interesting lecture from a professor of philosophy.' Believe it or not, people will tune in, and after the lecture they're going to go on their gates, hang on their bars, and they're going to talk about it.”

    Education, he says, also makes prison a safer place. “If I'm working on a paper banging away(砰砰响个不停)on my typewriter, I have other things on my mind. I'm not fighting in the prison yard.” Most prison administrators support that view. “They understand it makes prison a safer place if you have a group of guys with their eyes on the prize who are trying to change themselves.”

    John J. Lennon arrived at Attica in 2004 with a 9th grade education, but in May will graduate with a two-year associate degree. Attica creative writing workshops have changed his life.

    “I came into prison looking up to gangsters(匪徒), now I look up to scholars and intellectuals like Doran Larson, Tim Golden, all these Pulitzer-winning journalists. Education has changed the lens(镜头)through which I view the world. I don't look up to gangsters anymore. I think it's a horrible lifestyle.”

    Hamilton College professor Doran Larson has been teaching creative writing workshops at Attica since 2006. He says the demand for education from inmates is enormous and that it's “almost impossible to create a program large enough to satisfy the desire which pushes against the public perception(认识)that such people inside aren't interested in education.”

    Thoughts on prison education have changed over the years. Until 1973, there was a period of rehabilitation(改造)in American prisons. Even after that year, college degree programs were available for inmates nationwide until 1994, when the country's movement to get tough on crime made prisoners not qualified for Pell fund aid. “We have moved to a punishment mentality(心态),” Larson says. No one cared about these people “as long as they are kept from the outside.”

    Larson argues that inmates want to become productive members of society. The prison population is “a huge untapped resource, both commercial and intellectual. And right now there is far from enough being done to tap into skills which can get them off the public dole(失业救济金)and turn them into taxpayers.”

    When I was in my fourth year of teaching, I was also (and am still) a high school track and field coach (田径教练). One year, I had a student, John, who entered my class when he was a junior.

    When I was in my fourth year of teaching, I was also (and am still) a high school track and field coach (田径教练). One year, I had a student, John, who entered my class when he was a junior. John changed to our school from Greece, and seemed to be interested in athletics, so I encouraged him to join our track team. I explained to him that even though he had never taken part in it before, I did believe that he could do well in any event, and I would be willing to coach him at whichever ones interested him. He accepted the offer, and began to work hard at every practice.

    About a month later, I had found out from other sources that John was a first-class tennis player, winning various junior awards in his home country. I went to him asking, “John, I really appreciate that you came out for the track team, but why didn't you play tennis instead? It seems that would interest you a lot more, since you're so good at it.” John answered, “Well, I like tennis, but you told me that you believed in me, and that you thought I could do well in track, so I wanted to try it for that reason.”

    From then on, I often remember my student's reply. I told it to a friend and she suggested I write it down to share somewhere with more teachers. No matter how critical (不满的) students can be of themselves, I've found that a simple “I trust that you can do it!” can go a long way!

    Standing desks have become common across Silicon Valley, offering health benefits to those willing to work on their feet. However, due to their high price, they have failed to catch on until now. Recently, Ikea has brought out Bekant convertible(可变换的) standing desk that can become a normal desk at the touch of a button. The $500 adjustable desk can transform from a standard desk to a standing one, and Ikea hopes it could make the standing desk mainstream.

    Experts say that changing from a seated to a standing desk can improve productivity. Similar desks have become a common sight at tech firms such as Google, where some employees have even installed treadmill (跑步机) and bicycle desks.

    The desk is not the first "convertible" on the market. As early as 2013, Stir Kinect brought out an adjustable desk. The $3,890 Stir Kinect desk has a motor to raise and lower itself, changing it into a standing desk or a traditional desk. The desk can even be programmed to move up and down slightly, making it appear to take a gentle breath to remind the user to change their positions. To move between sitting and standing positions, owners simply double tap on the screen. The desk can learn the user's preferences over time and suggest the best seating position.

    The Stir Kinect desk was created by a team of ex-Apple and Disney engineers. It has a built-in touch screen to control and track movement, and can tell users exactly how many calories they burn by standing during their working day. It also has devices containing power points and USB ports for charging phones, to keep cables hidden.

    "Ikea's height-adjustable desk is great for opening up the lower end of the market, " said JP Labrosse, founder and CEO of Stir.