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    In the famous fairy tale, Snow White eats the Queen's apple and falls victim to a curse（诅咒）;in Shakespeare's novel, Romeo drinks the poison and dies; some ancient Chinese emperors took pellets（药丸）that contained mercury（水银）, believing that it would make them immortal, but they died afterward.

    Poison has long been an important ingredient in literature and history, and it seems to always be associated with evil, danger and death. But how much do you really know about poison?

    An exhibition, The Power of Poison, opened last month at the American Museum of Natural History in New York, intended to give the audience a more vivid understanding of poison.

    The museum tour starts in a rainforest setting, where you can see live examples of some of the most poisonous animals: caterpillars（毛毛虫）, frogs and spiders. Golden poison frogs, for instance, aren't much bigger than a coin, but their skin is covered with a poison that can cut off the signaling power of your nerves, and a single frog has enough venom to kill 10 grown humans.

    "Poisons can be bad for some things," Michael Novacek, senior vice president of the museum, told NBC News. "Yet they can also be good for others."

    A poisonous chemical found in the yew tree is effective against cancer, which is what led to the invention of a cancer-fighting drug called Taxol.

    The benefits from natural poisons are not limited to just medicine. Believe it or not, many substances（物质）that we regularly ingest（摄入）-chili, coffee and chocolate-owe their special flavors or stimulating（提神的）effects to chemicals that plants make to poison insects.

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    The technology is great. Without it we wouldn't have been able to put a man on the moon, explore the ocean's depths or eat microwave sausages. Computers have revolutionized our lives and they have the power to educate and pass on knowledge. But sometimes this power can create more problems than it solves.

    Every doctor has had to try their best to calm down patients who've come into their surgery waving an Internet print-out, convinced that they have some rare incurable disease, say, throat cancer. The truth is usually far more ordinary, though: they don't have throat cancer, and it's just that their throats are swollen. Being a graduate of the Internet “school” of medicine does not guarantee accurate self-health-checks.

    One day Mrs. Almond came to my hospital after feeling faint at work. While I took her blood sample and tried to find out what was wrong, she said calmly, “I know what's wrong；I've got throat cancer. I know there's nothing you doctors can do about it and I've just got to wait until the day comes.”

    As a matter of routine I ordered a chest X-ray. I looked at it and the blood results an hour later. Something wasn't right. “Did your local doctor do an X-ray?” I asked. “Oh, I haven't been to the doctor for years,” she replied. “I read about it on a website and the symptoms fitted, so I knew that's what I had.”

    However, some of her symptoms, like the severe cough and weight loss, didn't fit with it—but she'd just ignored this.

    I looked at the X-ray again, and more tests confirmed it wasn't the cancer but tuberculosis (肺结核)—something that most certainly did need treating, and could be deadly. She was lucky we caught it when we did.

    Mrs. Almond went pale when I explained she would have to be on treatment for the next six months to ensure that she was fully recovered. It was certainly a lesson for her. “I'm so embarrassed,” she said, shaking her head, as I explained that all the people she had come into close contact with would have to be found out and tested. She listed up to about 20, and then I went to my office to type up my notes. Unexpectedly, the computer was not working, so I had to wait until someone from the IT department came to fix it. Typical. Maybe I should have a microwave sausage while I waited?

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    We have a wide variety of activities and sports to choose from: fishing, dance, basketball, soccer, baseball, and tennis. Boys and girls, aged 8-16, can customize their own schedules in our 2, 3, 4 or 6 week summer camp session for kids.

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    Happy, angry, amazed—these are some of the emotions we like to express these days when we're sending a message on our smart phones. That's why many of us now add little pictures to our texts to brighten up someone's mobile screen but we're also using them as a quick way of telling someone how we're feeling. Yes, emojis have become a vital tool for communication.

    Let's clear one thing up first—there are emojis and emoticons (表情符号). The latter are little images made using normal keys on a keyboard. For example, a colon, two dots, followed by the curved line of a close brackets is a “smiley face”.

    The emoji was first invented in Japan in the late 1990s and the word “emoji” comes from the Japanese words for “picture” and “character”. The number of different images has dramatically increased since then and now we have a picture for every mood or situation.

    So now we have the option to give this new creation the visual “thumbs-up” but have you thought why we've become so addicted to using emojis? Professor Vyv Evans who has written a book called The Emoji Code says, “What we're finding is that digital communication is taking over from certain aspects of face-to-face interaction…One of the reasons emojis are so interesting is that they really do enable us to express our emotional selves much more effectively.”

    Another advantage of emojis is that they are an international language—they don't use words but tell a message in pictorial form so they can be easily interpreted whatever your native language.

    Emojis are a good way for showing empathy (共鸣)—they are a virtual hug or an adorable tease. But as linguist Neil Cohn says, “To many, emojis are an exciting evolution of the way we communicate while to others, they are linguistic (语言学的) Armageddon.” It does show there is a lot more to our communication than words alone but does this mean the decline in traditional writing?

    Houses have been getting progressively "smarter" for decades, but the next generation of smart homes may offer what two Case Western Reserve University scientists are calling an "Internet of Ears."

    Today's smart home features appliances, entertainment systems, security cameras and lighting, heating and cooling systems that are connected to each other and the Internet. They can be accessed and controlled remotely by computer or smartphone apps.

    But a group of electrical engineering and computer science professors in the Case School of Engineering have been experimenting with a new suite of sensors (传感器). This system would read not only the vibrations (震动), sounds and even other movements associated with people and animals in a building, but also any slight changes in the existing electrical field.

    While there still maybe a decade or so away, the home of the future could be a building that adjusts to your activity with only a few small, hidden sensors in the walls and floor with-out the need for monitoring cameras.

    "We are trying to make a building that is able t0 61isten' to the humans inside," said Ming-Chun Huang, an assistant professor in electrical engineering and computer science. "We are using principles similar to those of the human ear, where vibrations are picked up and our algorithms (计算程序) recognize them to determine your specific movements. That's why we call it the 61nternet of Ears'. "

    “There is actually a constant 60 Hz electrical field all around us, and because people are somewhat conductive, they short out the field just a little," Huang said. "So, by measuring the disturbance in that field, we are able to determine their presence, or even their breathing, even when there are no vibrations associated with sound.”

    Huang said they have used as few as four small sensors in the walls and floor of a room.

    As for privacy concerns, the system would not be able to identify individuals, although it could recognize people's different ways of walking.

Tea is currently the world's most popular drink, only after water. However, there was a time when tea was known only to the Chinese. So, how did tea originate in China? And how did it get to conquer the world to the extent that people often describe something they really like as their "cup of tea"? 

While we know that tea drink started in China, its true origin remains something unknown. Legend has it that about 5, 000 years ago, Shennong came across tea when dried leaves blew into a pot of boiling water. Following his discovery, tea was used as medicine, included in meals and later offered as a refreshing drink to officials and noblemen. Eventually, it became a common drink enjoyed by all Chinese people. 

The love of tea inspired many people to write about it. Over the years, tea drinking became an important part of China's rich culture. The great poet Du Fu described his tea-drinking experience in poetic language. Lu Yu, a tea master, wrote The Classic of Tea, which remains the earliest and most famous detailed study on tea in the world. 

It is then not surprising that the beauty of tea was eventually spread to a wider world. Tang and Song Dynasties needed strong Tibetan horses, so the Tea Horse Road was born. Porters (脚夫) carrying back-breaking loads of tea bricks made their way through dangerous snow-covered mountain passes, to trade Sichuan and Yunnan tea for horses. Over time, the gift of tea was further delivered to Western Asia and Easten Africa. As early as the Tang Dynasty, Saicho, a Japanese monk came to study in China and took tea seeds and tea-making customs to Japan. Around the 1600s, tea was shipped to Europe from China by Portuguese and Dutch sea traders.