As a child, Alain Robert was afraid of heights. When he was 12, he returned home from school. At the front door of his building, he looked for his keys. he didn't have them. It was 3:30 and his parents worked until 6:00 pm. Alain looked at his apartment on the eighth floor. He saw an open window. He closed his eyes and imagined himself climbing the building. When he opened his eyes, he told himself ,"I can do it." Fifteen minutes later, he was in his house and his fear of heights was gone.

    Today, Alain still climbs buildings. In 2003 , he climbed a building in London dressed as Spiderman(蜘蛛人) to advertise the movie. In 2004, he climbed Taipei 101 (one of the tallest buildings in the world). To reach the top of a building, Alain uses only his hands and special shoes. He has no rope or other safety tools.

    Alain climbs as a hobby. He also does it to make money for charity. When he climbs, he wants to send a message to people. If you have a dream—something you really want to do—it can become real. But you must be brave and keep trying. If something bad happens, don't give up. Close your eyes and tell yourself, "I can do it."

    All animals produce waste. We call it "waste," but we all know it can be very useful. In some parts of the world, animal waste, or poop, is collected, dried, and burned for cooking and heating. {#blank#}1{#/blank#} 

    The Chengdu Giant Panda Breeding Center has an unusual way of using animal "waste." The center's 40 pandas produce about two tons of poop a day. This material is being turned into a new product called Panda Poop Paper. {#blank#}2{#/blank#} After all, paper is made from plant fiber, which cannot be digested and simply goes through the body as waste.

    Since pandas eat nothing but bamboo, their "waste" is perfect paper material. {#blank#}3{#/blank#} 

    Their stomachs haven't fully developed for their vegetarian diet, so their bodies make use of just 20% of what they eat. The other 80% comes out as poop: very high in fiber and perfect for paper.

    Once the poop is collected, it is cleaned with chemicals, crushed(碾碎), and put into frames(框架) to dry. {#blank#}4{#/blank#} Because of its good quality as well as the worldwide popularity of the panda, gift products made from the paper sell well.

    {#blank#}5{#/blank#} They got the idea from the elephant dung(大象粪) paper made at Elephant Conservation Center in Chiang Mai, Thailand. And Creative Paper Wales in the U.K. sell paper gifts made from sheep waste.

A. But do you know some paper from poop?

B. Where does the paper come from?

C. After these steps, good, strong paper comes into being.

D. Moreover, there is more special about pandas.

E. It's not really that strange!

F. Yet, the Chinese weren't the first people producing paper from animal waste.

G. Farmers have been using animal and human waste for a long time.

    When Randy Heiss went hiking behind his Patagonia, Ariz. farm, the last thing he expected to find was a Christmas list from a little girl across the US-Mexico border. "I found this balloon on my morning walk near Patagonia on Sunday. Attached to it was a piece of paper with the Christmas wishes from a little girl," Heiss wrote on his Facebook page.

    When he brought the list home to his wife, who speaks fluent Spanish, they determined that the little girl had asked for Enchantimals toys, clothes, art supplies and various other gifts. That's when Heiss set out to make the little girl's Christmas dreams come true. Heiss said he had attempted to send Christmas letters to Santa Claus via balloon when he was a kid but never received a response.

    Heiss sent a Facebook message on Wednesday to XENY, a radio station in Nogales, to see if it could help him track down the girl or her family. He later received a response from the station, which had determined the author of the letter was an 8-year-old girl named Dayami, and the station wanted to set up a meeting between the two on Thursday. "It just changed my entire day," Heiss told the Washington Post. "Instead of going back to my office in Bisbee, I went with my wife to Walmart."

    The couple bought almost everything on Dayami's list. They also brought a few gifts for Dayami's little sister, Ximena. They told the children they were " ayudantes de Santa," or Santa's helpers.

    Heiss, 60, said the experience was very healing for him and his wife. Nine years ago, the couple's only son died. "Being around children at Christmas time has been absent in our lives," Heiss said. We now have friends for life. For a day, that border fence with its concertina wire melted away.

    I.M. Pei, the Chinese-American, who was regarded as one of the last great modernist architects, has died at the age of 102.

    Although he worked mostly in the United States, Pei will always be remembered for a European project: His redevelopment of the Louvre Museum in Paris in the 1980s. He gave us the glass and metal pyramid in the main courtyard, along with three smaller pyramids and a vast subterranean (地下的) addition to the museum entrance.

    Pei was the first foreign architect to work on the Louvre in its long history, and initially his designs were fiercely opposed. But in the end, the French—and everyone else—were won over. Winning the fifth Pritzker Architecture Prize in 1983, he was thought as giving the 20th century "some of its most beautiful inside spaces and outside forms … His talent and skill in the use of materials approach the level of poetry."

    After studying architecture at the Massachusetts Institute of Technology and Harvard, Pei set up his own architectural practice in New York in 1955.

    Designing the John F. Kennedy Presidential Library & Museum in 1964 established him as a name. His East Building of the National Gallery of Art in Washington in 1978 changed people's ideas of a museum. The site was an odd trapezoid (梯形) shape. Pei's solution was to cut it in two. The resulting building was dramatic, light and elegant—one of the first crowd-pleasing cathedrals of modern art.

    Though known as a modernist, and notable for his forms based on arrangements of simple geometric (几何的) shapes, he once urged Chinese architects to look more to their architectural tradition rather than designing in a western style.

    In person, I.M. Pei was good-humored, charming and unusually modest. His working process was evolutionary, but innovation (创新) was never an intended goal.

    "Stylistic originality is not my purpose," he said. "I want to find the originality in the time, the place and the problem."

    With the possible exception of equal rights, perhaps the most controversial issue across the United States today is the death penalty. Many argue that it is an effective deterrent (威慑) to murder, while others maintain there is no convincing evidence that the death penalty reduces the number of murders.

    The principal argument advanced by those opposed to the death penalty, basically, is that it is cruel and inhuman punishment, which is the mark of a brutal society, and finally that it is of questionable effectiveness as a deterrent to crime anyway.

    In our opinion, the death penalty is a necessary evil. Throughout recorded history there have always been those extreme individuals in every society who were capable of terribly violent crimes such as murder. But some are more extreme than others.

    For example, it is one thing to take the life of another in a fit of blind rage, but quite another to coldly plot and carry out the murder of one or more people in the style of a butcher. Thus, murder, like all other crimes, is a matter of relative degree. While it could be argued with some conviction that the criminal in the first instance should be merely separated from society, such should not be the fate of the latter type murderer.

    The value of the death penalty as a deterrent to crime may be open to debate. But the overwhelming majority of citizens believe that the death penalty protects them. Their belief is strengthened by evidence which shows that the death penalty deters murder. For example, from 1954 to 1963, when the death penalty was consistently imposed in California, the murder rate remained between three and four murders for each 100,000 population. Since 1964 the death penalty has been carried out only once, and the murder rate has risen to 10.4 murders for each 100,000 population. The sharp climb in the state's murder rate, which began when executions stopped, is no coincidence. It is convincing evidence that the death penalty does deter many murderers. If the bill reestablishing the death penalty is banned, innocent people will be murdered—some whose lives may have been saved if the death penalty were in effect. This is literally a life or death matter. The lives of thousands of innocent people must be protected.

Robots have long been drawing inspiration from animals, with the creation of robot dogs or snake-shaped robots. And yet, the field of robotics is far less enthusiastic about the other kind of living things—plants. Barbara Mazzolai, an Italian roboticist owes this to a misconception about plant behavior: that they cannot move or think. "It's not true at all," she says. To challenge this view, Dr Mazzolai and her team recently launched a machine called "FiloBot", a robot based on a climbing species.

To survive, a climbing plant must switch between several different behaviors. In forest environments, it must first grow out of the soil and travel along the ground in search of a support to hold onto, such as a nearby tree. Once a support is located, though, the plant fixes itself around the object and then growing towards the light. To choose the best angle to grow upwards, a climbing plant uses its shoots(芽) to receive information about light and gravity.

FiloBot has sensors on its main shoot. It can 3D-print its body with plastic and grow at a controllable rate. These functions researchers found, enabled FiloBot to cross gaps, and find things to attach to. The lack of heavy on-board computing device means that it is light and requires minimal care, while its slow pace means that it doesn't disturb things around it, making it possible to move through a complex, unseen environment, or monitoring disaster sites.

For now, FiloBot is still being tested. Its tendrils(卷须) have not left the laboratory. Still, it has already been employed in deconstructing plant behaviour. For example, it was long assumed that climbing plants find their supports by growing towards shade, though the exact mechanism was unclear. FiloBot could imitate this behaviour by detecting far-red light, which is typical of shaded areas, providing clues to how plants do it.

Dr Mazzolai hopes that such projects will inspire other roboticists to take their cues from plants and develop completely new technologies.