Lisa Pina never thought she would need the fire safety training she received during her apprenticeship(学徒期)as a union painter and dry waller(筑墙工). On Friday morning, she was thanking God she had it.

    On Thursday night, while Pina was babysitting her granddaughter, nephew and two nieces in her sister's apartment, she smelled smoke and realized the apartment building was on fire. When her 4-year-old granddaughter Ilean Garcia began saying, “We're going to die, ”she knew she had to act.Pina,39, first sealed the door, and then told all four children to get on the floor. After calling 911, she told the children to start singing and promised them all treats as soon as they reached safety. “I said, ‘OK, we're going to lie down and we're all going to play a game,'” Pina said. “We all started singing our ABCs and 123s.I was just trying to make it fun.” Pina patiently waited, and a few minutes later, Riverside County sheriff's deputies (治安官的助手) arrived. Pina, Ilean,8yearold Gabriel Parga,5-year-old Aubreyana Parga and 4-year-old Meriyah Parga were all trapped on the second floor as flames filled the first story.  Pina did the only thing she could. She opened the window and dropped the children, one-by-one, into the arms of the sheriff's deputies about 15 to 20 feet below. “I just needed to keep the kids calm so they wouldn't be afraid，”Pina said.“I was deathly afraid inside，but I couldn't let them know that.”[Not long after dropping the children out of the window, firefighters arrived with a ladder and rescued her. Ten people were treated at the scene for suffering smoke, but nobody was seriously injured.

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    We may think we're a culture that gets rid of our worn technology at the first sight of something shiny and new, but a new study shows that we keep using our old devices (装置) well after they go out of style. That's bad news for the environment – and our wallets – as these outdated devices consume much more energy than the newer ones that do the same things.

    To figure out how much power these devices are using, Callie Babbitt and her colleagues at the Rochester Institute of Technology in New York tracked the environmental costs for each product throughout its life – from when its minerals are mined to when we stop using the device. This method provided a readout for how home energy use evolved since the early 1990s. Devices were grouped by generation. Desktop computers, basic mobile phones, and box-set TVs defined 1992. Digital cameras arrived on the scene in 1997. And MP3 players, smart phones, and LCD TVs entered homes in 2002, before tablets and e-readers showed up in 2007.

    As we accumulated more devices, however, we didn't throw out our old ones."The Living-room television is replaced and gets planted in the kid's room, and suddenly one day, you have a TV in every room of the house," said one researcher. The average number of electronic devices rose from four per household in 1992 to 13 in 2007. We're not just keeping these old devices-we continue to use them. According to the analysis of Babbitt's team, old desktop monitors and box TV's with cathode ray tubes are the worst devices with their energy consumption and contribution to greenhouse gas emissions(排放) more than doubling during the 1992 to 2007 window.

    So what's the solution(解决方案)?The team's data only went up to 2007, but the researchers also explored what would happen if consumers replaced old products with new electronics that serve more than one function, such as a tablet for word processing and TV viewing. They found that more on-demand entertainment viewing on tables instead of TVs and desktop computers could cut energy consumption by 44%.

    It's always adventurous and romantic to visit an island country. Take a look at some breathtakingly beautiful island countries in the world, which everyone should visit at least once in his lifetime.

    Maldives

    It's believed that Maldives is one of the most popular honeymoon places as well as one of the most beautiful island countries. Situated in the middle of the Indian Ocean, Maldives is made up of a series of ancient coral reefs that grow up along the sides of ancient volcanoes, with fascinating beaches.

    Fiji

    Fiji has plenty of surprises for any adventurous travelers. It is famous for the world's best surf scenes, attracting many surfing lovers to ride the great waves. Well, if surfing is not for you and you love sitting on the beach and relaxing, hiking or seeing breathtaking waterfalls, Fiji is also a suitable island country to visit.

    Malta

    Malta, a beautiful southern European country in the Mediterranean Sea, has a rich history and culture. There are amazing sky-high cliffs to climb, wonderful temples to visit and lots of amazing places to go diving. There are plenty of interesting things to explore here and everyone can find something to enjoy. The historic part of Malta is shown in its architecture, great walled cities, and many underground tunnels.

    Though pigs may never fly, a two-year-old pig in Franschhoek, South Africa is proving they sure can paint! Meet Pigcasso, the world's first known pig artist whose masterpieces are selling for thousands of dollars to benefit Farm Sanctuary S. A. , Africa's only registered shelter for rescued farm animals.

    Joanne Lefson, who saved Pigcasso from a slaughterhouse(屠宰场) two years ago, discovered the animal's artistic talent accidentally. The South African activist says, of the numerous toys presented to keep the then four-week-old piglet entertained, it was the paintbrushes that seemed to attract her the most. "They were the only thing she didn't eat," Lefson quips.

    The rescuer decided to present the pig with canvas and paint and see what happened. To her delight, Pigcasso began creating works of art that can best be described as "abstract expressionism". Now weighing a hefty(重量）450 pounds, the celebrated pig, who loves to paint the area's scenic landscapes, has a dedicated "studio" at Farm Sanctuary S.A. where she resides. Lefson says, "I do not force her to paint. She paints when she wants to."

    Pigcasso's artwork, which has thus far been sold online, is currently on display at Cape Town's picturesque Victoria ~ Alfred Waterfront. Dubbed "Oink", the pop-up exhibition will run through March 5before heading to London-Paris-Berlin, and Amsterdam. Lefson says its main aim is to highlight the effect of animal agriculture on the planet and inspire change.

    While Pigcasso is the first pig and first nonhuman to headline an exhibition, she is not the first animal to create masterpieces. Elephants, sea lions, and even penguins have shown similar artistic talent--in exchange for some treats, of course!

    NOT all memories are sweet. Some people spend all their lives trying to forget bad experiences. Violence and traffic accidents can leave people with terrible physical and emotional scars. Often they relive these experiences in nightmares.

    Now American researchers think they are close to developing a pill, which will help people forget bad memories. The pill is designed to be taken immediately after a frightening experience. They hope it might reduce ,or possibly erase(抹去),the effect of painful memories.

    In November, experts tested a drug on people in the US and France. The drug stops the body releasing chemicals that fix memories in the brain. So far the research has suggested that only the emotional effects of memories may be reduced, not that the memories are erased.

    The research has caused a great deal of argument. Some think it is a bad idea, while others support it.

    Supporters say it could lead to pills that prevent or treat soldiers' troubling memories after war. They say that there are many people who suffer from terrible memories.

    "Some memories can ruin people's lives. They come back to you when you don't want to have them in a daydream or nightmare. They usually come with very painful emotions," said Roger Pitman, a professor of psychiatry at Harvard Medical School. "This could relieve a lot of that suffering."

    But those who are against the research say that changing memories is very dangerous because memories give us our identity (特质). They also help us all avoid the mistakes of the past.

    "All of us can think of bad events in our lives that were horrible at the time but make us who we are. I'm not sure we want to wipe those memories out, "said Rebecca Dresser, a medical ethicist.

    It seems that electronic devices just keep getting smaller. Scientists in the United States have announced the creation of the first transistor with only two dimensions(二维).

    A transistor is a small electronic device that transfers or carries electronic current. Scientists hope these new 2D transistors will be used for building high-resolution(高分辨率)displays that need very little energy.

    Two groups of scientists created these 2D transistors. They report that the transistors are only a few atoms thick.

    Usually transistors are made with the element silicon(硅). Computer processors, memory chips, TV screens and other electronic devices contain billions of silicon-based transistors. But these very small electrical parts have certain limitations.

    Dimitris Ioannou is an electrical engineering professor at George Mason University. He says the traditional transistor has been improved as much as it can be. He adds that researchers have been looking for new materials with special features and they want transistors to be seen through and soft.

    "If the layers are very thin, the transistor can become flexible, so it doesn't have to be rigid(坚硬的), like it would be in a silicon chip. So people can think of applications like wearable electronics, television screens and other things," said Ioannou.

    These new transistors can also carry higher current. They also can move the current much faster than traditional transistors. This is important for high-definition screens.

    Dimitris Ioannou says the scientific success could prove very useful in the future. "Now, how good and how useful it will be, it's still in the stage of research, but it certainly is an advance," said Ioannou.