Many of us remember being in awe(敬畏) when we saw cloned dinosaurs running wild in the film Jurassic Park. And the idea of using technology to revive(恢复) extinct species has long fascinated not only writers and directors, but scientists as well.

    According to The Telegraph, woolly mammoths(长毛猛犸象), which featured in the popular Ice Age animated movie series, “may walk the earth once more” now that scientists have taken another step toward realizing a long-held dream—recreating their DNA.

    Mammoths became extinct around 10,000 years ago. However, since the discovery of near-perfect preserved remains in Arctic permafrost(北极冻土带) in May 2013, a variety of research studies have been carried out since.

    Geneticists from Harvard University analyzed DNA from the remains, looking for genes which separated mammoths from elephants, such as hairiness and ear size. They then used the results to reproduce exact copies of 14 mammoth genes. “It is the first time that mammoth genes have been alive—although so far it has only been done in the lab,” George Church, lead researcher of the project, told the Sunday Times.

    Church then used a new technique which allows scientists to edit DNA carefully, replacing sections of elephant DNA with the mammoth genes. So “we now have functioning elephant cells with mammoth DNA in them,” he said.

    However, Church ruled out the possibility of bringing the mammoths back to life via cloning from frozen remains. He said he “preferred to focus on rebuilding the full mammoth genome(基因组) by analyzing DNA from preserved remains and putting it into the cells of its closest living relative – the Asian elephant,” reported The Telegraph.

    Church argued that the return of the woolly mammoth—or rather, the return of something very similar—could help bring back fragile(脆弱的) ecosystems. However, some scientists believe that bringing back the mammoth would be unethical.

    Professor Alex Greenwood, an expert on ancient DNA, said: “We may face the extinction of African and Asian elephants. Why bring back another elephant from extinction when we cannot even keep the ones that are not extinct around?” he told the Sunday Times. “What is the message? We can be as irresponsible with the environment as we want. Then we'll just clone things back?”

    “Money would be better spent focusing on conserving what we do have than spending it on an animal that has been extinct for thousands of years,” he said.

    A mouse looked through the hole in the wall to see the farmer and his wife open a pckage, and he was devastated to discover it was a mousetrap. Returning to the farmyard, he warned everyone. “There is a mousetrap in the house! There is a mousetrap inthe house! There is a mousetrap inthe house! ”

    The chicken raised her head and said, “Thanks for your warning. Mr. Mouse, but why should I be bothered by a mousetrap?” the pig sympathized, but said, “Wow, Mr. Mouse, I'm sorry for you I can tell this is a great concern to you, but it is none of my business.” The mouse returned to the house, head down and depressed, to face the farmer's mousetrap alone.

The very night a sound was heard throughthe house—-like that of a mouse trap catching its prey. The farmer's wife rushed to see what was caught. In the darkness, she did not see it was a snake whose tailwas caught by the trap, and it bit her. The farmer rushed her to the hospital and she returned home with a fever.

    The farmer killed the chicken to make fresh chicken soup for his wife, but her sickness continued. Frineds and neighbors came to visit her, and to feed them, the farmer butchered the pig. Then she died. So many people came for her funeral that the farmer had the cow cooked to provide enough meat for all of them.

    The mouse looked upon it all from his hole in the wall with great sadness.

The young boy saw me, or rather, he saw the car and quickly ran up to me, eager to sell his bunches of bananas and bags of peanuts. Though he appeared to be about twelve, he seemed to have already known the bitterness of life. "Bananas 300 naira. Peanuts 200 naira." He said in a low voice. I bargained him down to 200 for the fruit and nuts. When he agreed, I handed him a 500 naira bill. He didn't have change. So I told him not to worry. He said thanks and smiled a row of perfect teeth.

    When, two weeks later, I saw the boy again, I was more aware of my position in a society where it's not that uncommon to see a little boy who should be in school standing on the corner selling fruit in the burning sun. My parents had raised me to be aware of the advantage we had been afforded and the responsibility it brought to us.

I pulled over and rolled down my window. He had a bunch of bananas and a bag of peanuts ready. I waved them away. "What's up?" asked him. "I…I don't have money to buy books for school." I reached into my pocket and handed him two fresh 500 naira bills. "Will this help?" I asked. He looked around nervously before taking the money. One thousand naira was a lot of money to someone whose family probably made about 5,000 naira or less each year. "Thank you, sir." he said. "Thank you very much!"

    When driving home, I wondered if my little friend actually used the money for schoolbooks. What if he's a cheat? And then I wondered why I did it. Did I do it to make myself feel better? Was I using him? I didn't know his name or the least bit about him, nor did I think to ask.

    Over the next six months, I was busy working in a news agency in northern Nigeria. Sometime after I returned, I went out for a drive. When I was about to pull over, the boy suddenly appeared by my window with a big smile ready on his face.

"Oh, gosh! Long time."

"Are you in school now?" I asked.

    He nodded.

"That's good," I said. A silence fell as we looked at each other, and then I realized what he wanted. "Here," I held out a 500 naira bill. "Take this." He shook his head and stepped back as if hurt. "What's wrong?" I asked. "It's a gift."

He shook his head again and brought his hand from behind his back. His face shone with sweat. He dropped a bunch of bananas and a bag of peanuts in the front seat before he said, "I've been waiting to give these to you."

    I will absolutely be the first person to romanticize libraries. I come from a home with thirty-two bookcases, a count that does not include the several dozen boxes of books in the attic labeled "work" and "extra." All these books are courtesy of my parents, both of whom were English majors in their day and in whose footsteps I never hesitated to follow. My childhood dream was of a house with a claw-foot bathtub, stained glass, and (most importantly) an enormous library made of built-in shelves, a sliding ladder, and window seats in every window. As a high school girl, I began working at the county library near my house, following up on two summers of volunteering with their summer reading program. I was all starry eyes and romantic visions of alphabetizing the classics and discovering gems among the new arrivals. What I found instead was that the life of a library was nothing like my daydreams, but far more important than I could have imagined.

    There is no library that is only a library anymore. Modern libraries can't afford and don't try to be only a receptacle for free books. They offer classes, book groups, Internet access, resume and tax help, tutoring, and multimedia resources for anyone who might wander in. Librarians are equipped to help with research and give recommendations. Most libraries have access to interlibrary loans, making the acquisition of nearly any piece of material merely a matter of time. What makes libraries so unique and important, however, is none of the diversity of resources and opportunities for community that they most certainly provide.

    ____________________________________. Every building one enters today comes with some expectation of spending money. Restaurants require paying for service. Shops require the intention of purchasing something. Houses require rent. Anyone who has lived near the poverty line, whether or not they have actually been homeless, has felt the threatening pressure toward expenditure that permeates the public spaces of modern Western culture. Even a free restroom is becoming difficult to find, especially as growing cities experience ever-increasing space restrictions.

    In a library, no one is asked to pay anything simply to sit. For those with few resources besides time, this is a godsend. Libraries are unofficial playgrounds for low-income families on rainy days, homeless shelters in cold months, reprieves from broken homes for grade-school-age children. They are the last bastions of quiet and calm where nothing is asked of one but to exist. Many arguments have been made about how the library is an outdated institution offering outdated services—that in the twenty-first-century how-to books on building sheds and daily newspaper copies are obsolete and the funding used for libraries ought to be reallocated to other programs. I can only assume that those who make such arguments are people who have always been comfortable with the expenditures it takes to move through the world. For those people, libraries can be about books. But not everyone has the luxury of seeing past the space.

    Libraries, as they exist in the twenty-first century, are the only remaining public domain. In a library, anyone of any walk of life can come and go as they choose, and so long as they remain respectful of the space they can remain as long as they wish. Libraries welcome everyone, offering a place to be and easily accessible resources to the most vulnerable populations, whether in downtown Chicago or small-town Oklahoma. My childhood romantic vision of the library is still close to my heart, but the very real work that public libraries do today is so much more critical than a leather-bound edition of Homer or a graphic novel fresh off the press. Those are the things the library gives me, but libraries are for everyone.

    Many high school students consider a college education useless. Therefore, they choose not to go to college. If you're one of them, think again. Here are some reasons why you should go to college and receive a good education there.

    Schools and universities are the first sources of knowledge. We take that knowledge later on to build our careers after graduation. More knowledge will be gained after you start working, but without an education, that job will not be within easy reach. Knowledge leads to knowledge.

    While limited within the walls of the educational institutions, we openly explore other cultures of the world. We come to know that ours is not the only culture. Other cultures have valuable insights to share, enriching our own. Education also makes us want to travel and interact with various cultures, broadening our horizons.

    When there's a downturn (衰退) in the economy, those who attended college will be more likely to find a new job than those who only finished grade school and have a limited skills set. The more education you have, the more chances you will get to improve the quality of your life as you have a better job and earn a higher salary.

    When you're skillful and knowledgeable, you get to “rub knees” with people of similar backgrounds and tastes. It means a good education leads to excellent networking. Good networking can benefit you a lot in your later life.

    A good education makes you a more interesting person. You can talk about ideas and events instead of just other people and what's on sale in stores. An educated person doesn't gossip, having a preference to discuss ideas and listen to what other people have to say.

    A headache is the feeling you get when your head hurts. Headaches can differ from very mild to incredibly powerful. They can last anywhere from 10 minutes to hours. Very bad headaches are called migraines. People who suffer from migraine headaches often need to take the day off from school or work and lie in bed all day.

    Why do people get headaches? There are many possible causes. People who drink too much caffeine (in coffee or soft drinks, for example) or alcohol can end up with headaches. This is because these kinds of drinks take water away from the body. If the brain doesn't have enough water, it gets smaller and pulls away from the head. This can be extremely painful. The best way to get rid of this kind of headache is just to drink lots of water.

    Tension headaches happen when the body's muscles are too tight. When people feel stress, it is common for the muscles near the head to become tense. Tension headaches might also be caused by not getting enough sleep. Some people suffer from tension headaches for only short times but for other people, these kinds of headaches are a chronic problem that happens again and again. A massage (按摩) might help to stop a tension headache. If that doesn't help, you might need to see a doctor.

    Headaches can also be caused by much bigger health problems. For example, a head or neck injury can cause them. Headaches can also be a warming sign of a heart attack.