With only about 1,000 pandas left in the world, China is desperately trying to clone the animal and save the endangered species. That's a move similar to what Texas A & M University researchers have been undertaking for the past five years in a project called "Noah's Ark".

    Noah's Ark is aimed at collecting eggs, embryos (胚胎), semen and DNA of endangered animals and storing them in liquid nitrogen. If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A & M's College of Veterinary Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future.

    It is estimated that as many as 2,000 species of mammals, birds, reptiles will become extinct in over 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years.

    This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal. The entire procedure could take from three to five years to complete.

    "The nuclear transfer (核子移植) of one species to another is not easy, and the lack of available panda eggs could be a major problem," Kraemer believes. "They will probably have to do several hundred transfers to result in one pregnancy. It takes a long time and it's difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort," adds Kraemer, who is one of the leaders of the Project at Texas A & M, the first-ever attempt at cloning a dog.

    "They are trying to do something that's never been done, and this is very similar to our work in Noah's Ark. We're both trying to save animals that face extinction. I certainly appreciate their effort and there's a lot we can learn from what they are attempting to do. It's a research that is very much needed."

    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.

    The Healthy Habits Survey shows that only about one third of American seniors have correct habits. Here are some findings and expert advice.

    ⒈How many times did you brush your teeth yesterday?

    Finding: A full 3% of seniors brush their teeth only once a day

    Step: Remove the 300 types of bacteria in your mouth each morning with a battery-operated toothbrush. Brush gently for 2 minutes at least twice a day.

    ⒉How many times did you wash your hands or bathe yesterday?

    Finding: Seniors, on average, bathe fewer than 3 days a week. And nearly 30% wash their hands only 4 times a day—half of the number doctors recommend.

    Step: We touch our faces around 3,000 times a day—often inviting germs（病菌）to enter our mouth, nose, and eyes. Use toilet paper to avoid touching the door handle. And, most importantly, wash your hands often with hot running water and soap for 20 seconds.

    ⒊How often do you think about fighting germs?

    Finding: Seniors are not fighting germs as well as they should.

    Step: Be aware of germs. Do you know it is not your toilet but your kitchen sponge（海绵）that can carry more germs than anything else? To kill these germs, keep your sponge in the microwave for 10 seconds.

    China is known as a state of manners and ceremony. Many proverbs have been passed down from generation to generation such as "polite behavior costs nothing" or "showing respect each other" and so on. For instance, there is an interesting short story. Once upon a time, a man went on a long tour to visit his friend with a swan as a gift. But it escaped from the cage on the way. Though he tried hard, he got hold of nothing but a feather. Instead of returning home, he continued his journey with the swan feather. When his friend received this unexpected gift, he was deeply moved. And the saying "The gift is nothing much, but it's the thought that counts." was spread far and wide.

    Chinese used to cup one hand in the other before the chest as a greeting. This tradition has a history of more than 2, 000 years and nowadays it is seldom used except in the Spring Festival. And shaking hands is more popular. Bowing, as to show respect to the higher level, is often used by the lower like subordinates(下级), students, and attendants. But at present Chinese youngsters prefer to simply nod as a greeting.

    When you start a talk with a stranger, the topics such as weather, food, or hobbies may be good choices to break the ice. For a man, a chat about sports, stock market or his job can usually go on smoothly. Similar to Western customs, you should be careful to ask a woman private questions. However, relaxing talks about her job or family life will never put you into danger. Though Chinese are said to be implicit(含蓄的), they are actually humorous enough to be pleased about the jokes of Americans.

    More than 40 percent of the species that help with pollination (植物传粉) are under threat due to the polluted environment. So some researchers have been searching for ways to protect the bees and other crucial pollinators while some engineers have thought perhaps an army of robotic pollinators could keep humans well-supplied in these foods. A team of researchers has recently designed a small drone capable of pollinating flowers. They tested their device on the large, pink flowers of lilies. And it worked.

    Exciting as this success was, it is only the first step. The team has yet to figure out how to apply the concept on the massive scale. Could a fleet of robo-pollinators replace the bees?

    “Although the answer isn't a straightforward no, it would be a challenging leap to go from this one little drone pollinating one large flower to an army of drones spreading across fields of crops,” says Scott Swinton, an agricultural economist at Michigan State University.

    “The successful pollination was fascinating,” Scott Swinton says, “but the device itself might damage the flowers. I wonder how you make sure you're not doing more harm than good to flowers when you have a drone.”

    “Furthermore,” he points out, “a lily is a particularly easy flower for a drone to pollinate. To make this more broadly applicable for smaller and more complex flower structures, the drones would need to be particularly agile.”

    Still, Joshua Campbell, an expert at the University of Florida, says “Pollination systems are extremely complex and will always require insects. There is no substitute for bees.”

    “As for the technology itself, it is a promising new development in existing drone technology,” he added. Yet he still sees some hurdles ahead before drones can be applied on a large scale.

    Since so much written language we see today comes from a glowing screen, language has begun to change through our interaction with technology. Social media and the Internet have had a rapid and great effect on the English language, and not necessarily for the better. More and more people have found themselves writing in pieces of words and using unclear acronyms(单词首字母) both in written and spoken language.

    How many times have you typed "LOL" in response to a humorous message? Referred to someone as your "BFF"? Exclaimed, "OMG!" during a particularly shocking event? Social media has affected the words we use in our everyday life. Abbreviations and acronyms commonly known as "text talk" have made their way into both spoken and written language. These are becoming increasingly popular as people struggle for brief expressions to meet word limits on social media like Weibo and Twitter. In addition, the speed of the Internet means language is changing faster than ever. You no longer have to be published through physical and traditional means to bring word trends to public attention.

    Many people believe the overuse of these new terms is a passing trend, and nobody will be using them in just a couple of decades. With the change of language, older terms will surely disappear and fall out of style, and newer and more Internet language will take their place.

    But the Oxford English Dictionary thinks the contrary. In 2011, a lot of Internet terms including, "LOL," "BPB," "OMD," and "BFF" were added to the dictionary, making these acronyms official parts of the English language. According to the dictionary writers, these terms aren't going anywhere anytime soon.

    The words you use in everyday life are a reflection of yourself; this is especially true on the Internet with the lack of interaction in real life. With the Internet and social media rapidly getting popular, soon your words may be all you have left. Make them good ones.