Darek Fidyka, a 38-year-old Bulgarian, had been paralyzed (瘫痪的) from the chest down for four years after a knife attack. Scientists from Britain and Poland took cells from his nose, transplanted (移植) them into his back and re-grew his spinal cord (脊髓). Now he can walk and even drive a car. The doctors were delighted but said it was the first step in a long journey.

    The breakthrough came after 40 years of research by Professor Geoff Raisman, who found that cells had the possibility to repair damage to nasal (鼻腔的) nerves, the only part of the nervous system that constantly re-grows. “The idea was to take something from an area where the nervous system can repair itself and put it into an area that doesn't repair itself,” Professor Raisman said.

    Polish doctors injected (注射) the nasal cells into Mr Fidyka's spinal cord above the injury and used some nerves from his ankle to form a bridge across the damaged tissue. The nasal cells appear to have caused the spinal nerves to repair themselves.

    Professor Raisman achieved this with rats in the late 1990's, but this is his greatest success. “I think the moment of discovery for me was Christmas in 1997 when I first saw a rat, which couldn't control its hand, put its hand out to me. That was an exciting moment, because I realized then that my belief that the nervous system could be repaired was true.”

    Doctors chose the easiest case for their first attempt—it might not work for others. But there is a real sense of hope that an idea once thought impossible has been realized.

    David Nicholls, who helped provide money for the breakthrough, said information about the breakthrough would be made available to researchers across the globe.

    “What you've got to understand is that for three million paralyzed people in the world today, the world looks a totally brighter place than it did yesterday,” he said.

    Coca-Cola has created a publicity stunt (作秀) in Singapore — a vending machine (自动售货机) which gives out free cans of Coke in return for (作为对…回报) hugs. The whacky idea is part of the company's Open Haziness campaign (运动) designed to attract young people in Singapore.

    Students at the National University of Singapore were surprised to find that the soft drinks company had placed the machine in the schoolyard. But instead of the drinks brand's logo (标志), the words “Hug Me” are written across its red-and-white logo. Instead of paying money, customers have to hug the drinks machine to receive a free can of Coke.

    Public displays of affection are uncommon and have long been discouraged in Singapore, but are on the rise among young people. The move is part of a campaign created by advertising firm Ogilvy & Mather, intended to let the youth to see the brand as a non-threatening (无威胁的) friend.

    Leonardo O'Grady, leader of the campaign, said, “Happiness is contagious (传染的). The Coca-Cola Hug Machine is a single idea to spread some happiness. We want to spread happiness in an unexpected, creative way to attract not only the people present, but the audience at large.”

    He hopes that it will encourage consumers to bring positivity, optimism (乐观) and fun into their lives and to open a Coke, sharing a little happiness.

    The machines haw been such a success that there are plans to roll them out across Asia. Mr. O'Grady added, “The reaction was amazing — at one point we had four to five people hugging the machine at the same time as well as each other! In fact, there was a long line of people looking to give hugs.”

    Scientists have found living organisms(有机体) that could be 50,000 years old recently. The organisms were found in a hot, but beautiful cave system in Naica, Mexico. These ancient life forms can be seen only with a microscope, which proves they are probably microbes(微生物).

    Penelope Boston leads the Astrobiology Institute at NASA, the space agency of the United States. These ancient organisms are able to exist by eating minerals such as iron and manganese. If the findings are confirmed, they will show how microbes can survive in extreme conditions.

    Researchers have been studying ancient microbes for nine years. Forty different kinds of microbes and some viruses were found in the underground area this time. The genetic(基因的) structures of these organisms are different from those of their nearest relatives –viruses. That is similar to that humans are genetically different from mushrooms growing in forest. The caves in Naica are 800 kilometers deep. Before the miners began working in the caves, the area was isolated from the surface and the outside world.

    Some of the caves are as big as the large religious centers built during Europe's Middle Ages. There are crystals(晶体) covering the walls. Scientists must wear special clothing to keep cool. And the clothing keeps the crystals safe from human germs or other damage. The researchers could only work for about 20 minutes at a time before they have to go to a room that is 28 degrees Celsius to cool down.

    NASA officials would not let Boston share her findings with scientific experts until the last week's announcement. So scientists could not say much about the findings. But Norine Noonan, a biologist at the University of South Florida, said she believed them. “Why are we surprised?” Noonan asked, “As a biologist, I would say life on Earth is extremely tough and versatile.” “What's more, these organisms are not the oldest life forms on Earth. Scientists published studies about living microbes that may be 500,000 years old several years ago,” she added.

    We always knew our daughter Kendall was going to be a performer of some sort. She entertained people in our small town by putting on shows on our front porch when she was only three or four. Blonde-haired, blue-eyed, and beautiful, she sang like a little angel.

    When Kendall was five, we began to notice that she was blinking a lot and clearing her throat frequently. We took her to our local children's hospital where she was diagnosed with Tourette's Syndrome.

    It was pretty devastating（毁灭性的）because other children constantly made fun of her, and sadly, even a teacher teased her. Through all this, Kendall continued to sing and entertain. Remarkably, her tics disappeared when she sang.

    In 2005 when Kendall was sixteen, we thought she was pretty much out of the woods -- or at least heading in that direction. However, a freak accident happened.

    At a birthday party, Kendall hopped on a friend for a piggyback ride. Kendall flew over his back and landed on the cement floor -- on her neck. An ambulance rushed her to the hospital where she spent the next week, paralyzed from the neck down. Ironically, her biggest concern wasn't whether she would walk again, but whether she would be able to audition（试唱）for American Idol.

    Doctors said Kendall had central cord syndrome. Sometimes the pain was so unbearable that she had to bite down on a toothbrush to take her mind off it. As the days dragged on, we didn't know for sure how much of her movement would ever come back.

    I believe Kendall wanted the American Idol audition so much that she willed herself to move again. One of her friends brought a microphone to the hospital and put it on her bed. Every day, Kendall tried hard to pick it up with her right hand. It was more important for her to pick up that microphone than a spoon or fork.

    Sometimes we all cried because of the pain we witnessed. But on the day Kendall walked into the stadium to audition for American Idol – a mere three months after her accident -- we cried tears of joy. And our tears turned into shouts when she was given a golden ticket to Hollywood.

    Kendall is eighteen now, living every day to its fullest. She's recorded a CD with some of John Mellencamp's band members. I'm absolutely sure she's going to make it big some day. Kendall just puts it all in God's hands.

    When she was a little girl trying hard to be strong, she looked up at me, her big eyes brimming with tears, and asked me why she had to have Tourette's Syndrome. My heart ached to make the word right for my child. But I looked right back at her and told her the truth as I see it.

    “Kendall, God gave you a pure heart, an angelic voice, a strong mind, and a beautiful presence. With all of that, he had to make it fair for everyone else.”

    A Safe Personal Alarm

    MOST EFFECTIVE DEFENSE

    Loud: 125dB ear-piercing (刺耳的) panic alarm that scares away attackers

    Proven to be more effective than pepper spray as a defense tool

    Also commonly used by seniors to call for help in case of falling

    SUPER EASY TO USE

    Simply pull the pin, and this ear-piercing alarm will work for up to a half hour of continuous sound

    Plug the pin back in to stop the alarm.(Can be re-used over and over again)

    Easily attaches to keys, purses, backpacks or belts

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    —Jillian Thompson from Chicago, IL "Oh my WORD! This is SO loud! It's perfect to call attention to an unwanted situation or to call attention to anything where you may need assistance. I got myself one and one for each of my kids. The pin releases easily BUT it doesn't seem to just fall out either so you can carry with ease and won't have to worry about setting it off. But if you do, it's easy to slip it right back in. Haha! A little pull will give you a real good idea what it's capable of, I promise."

    —Angela Kelley from Palo Alto, CA "Bought three for the young women in our family .They were all very happy with the ease of use and how LOUD it is. Would definitely buy again."

    —Billy Perkins from Indianapolis, IN Are you ready to protect yourself and your loved ones from the bad guys?

    If plastic had been invented when the Pilgrims sailed from Plymouth, England, to North America-and their Mayflower had been stocked with bottled water and plastic- wrapped snacks, their plastic waste would likely still be around four centuries later. Atlantic waves and sunlight would have worn all that plastic into tiny bits. And those bits might still be floating around the world's oceans today, waiting to be eaten by some fish or oyster, and finally perhaps by one of us.

    Because plastic wasn't invented until the late 19th century, and its production only really took off around 1950, we have a mere 9.2 billion tons of the stuff to deal with. Of that, more than 6.9 billion tons have become waste. And of that waste, a surprising 6.3 billion tons never made it to a recycling bin-the figure that shocked the scientists who published the numbers in 2017.

    No one knows how much unrecycled plastic waste ends up in the ocean, the earth's last sink. In 2015, Jenna Jam beck a University of Georgia engineering professor, caught everyone's attention with a rough estimate between 5.3 million and 14 million tons of plastic waste each year just come from coastal regions.

    Meanwhile, ocean plastic is estimated to kill millions of marine(海洋的）animals every year. Nearly 700 species, including endangered ones, are known to have been affected by it. Some are harmed visibly, stuck by abandoned things made of plastic. Many more are probably harmed invisibly. Marine species of all sizes, from zooplankton to whales, now eat microplas-tics, the bits smaller than one-fifth of an inch across.

    "This isn't a problem where we don't know what the solution is, "says Ted Siegler, a Vermont resource economist who has spent more than 25 years working with developing nations on garbage." We know how to pick up garbage. Anyone can do it. We know how to deal with it. We know how to recycle. "It's a matter of building the necessary institutions and systems, he says, ideally before the ocean turns into a thin soup of plastic.