A new App has been used in South Africa to benefit (有助于)the relationship between wildlife and humans.

    Roadwatch, created by the Endangered Wildlife Trust (EWT),is designed to let drivers   record any roadkill they see on the country's highways.

    It may seem like a strange idea, but EWT says that it could become the perfect platform for receiving important information. Information on where endangered species (物种）are living and the danger that they are under from traffic can help to inform decisions on conservation of matters (物质守恒）in the future.

    People can use the App through Facebook, WhatsApp, SMS and Linkedin to report the   species, location, time and date of the creature that has been seen on the road.

    Wendy Collinson field officer at EWT suggested that it could lead to more people taking care on the roads and paying more attention to animals that may be trying to cross the roads. One of the biggest problems is with reptiles (爬行动物）and snakes, which she believes people hit on purpose, as they are generally seen as scary. However, they are important to the health of ecosystems, just as all creatures are and also need to be protected.

    Emily Taylor from EWT said, “Roadkill simply hasn't been studied here. The road ecology and how many endangered species are being killed, is something we need to know more about. We want people to report as much as possible.”

    There have been some other Apps to use in relation to wildlife spotting in South Africa, but most of them are about animals that have not been knocked down, including those helping to collect information of where certain species have been seen, such as in parks.

    Our eyes may be playing tricks on us.  New research shows that sometimes people physically see what they want to see. Cornell University social psychologist(心理学家) David

    Dunning carried out experiments to test whether wishful thinking can actually affect what we see.

    “It's well proved from what is experienced in everyday life, and from the laboratory as well, that people think what they want to think," he says. "We're taking this a step further.

    We're asking if strong wishes and fears can actually affect what people physically see."

    Dunning and his assistants told volunteers that a computer game would show them either a letter or number to decide whether they would drink orange juice or fruit syrup(果子露).

    As they wrote in the Journal of Personality and Social Psychology, the computer would flash an ambiguous picture, which could be seen as the letter "B" or the number "13". Volunteers who were told that a letter would get them orange juice most often reported seeing "B". Those who were told that a number would get them orange juice most often saw "13".

    The researchers also used a hidden camera to track volunteers' eye movements, particularly the first eye movement. "We don't control them," Dunning says, "and they don't even know that we are watching them, so it honestly shows what a person is seeing."

    "This research suggests that the brain is doing a lot of work between the eye and the conscious awareness to affect what we think," Dunning concludes (得出结论). "Before we even see the world, our brain has decided to keep what we want to see and avoid what we don't want to see."

    Have you ever paid attention to the Air Quality Index (空气质量指标) or AQI reported in the newspaper? The AQI helps us understand what the air quality around us means to our health. The AQI uses colors, numbers and words to tell us about the air. Let's see what these colors and numbers mean.

    Many objects in the universe are invisible, but they send radio waves. The radio telescope* thus appeared, and it is considered one of the greatest inventions in the twentieth century. Reber built the world's first radio telescope in 1937. Ryle and Hewish developed radio telescope systems for the location of weak radio sources, and they shared the Nobel Prize for Physics in 1974.

    A radio telescope is usually made up of:

    One or more antennas to collect the radio waves. Most antennas are made in the shape of a dish to collect and reflect, the radio waves to the sub—reflector, in the same way as a curved mirror focuses visible light to one point.

    A receiver and amplifier to receive the radio waves from the sub—reflector, and make these weak radio waves strong enough to be recorded and turned into electronic signals. To make an amplifier sensitive enough, it is usually cooled to, very low temperatures (e. g. as low as —270℃）.

    A recorder to keep a record of the electronic signals. Most radio telescopes today keep the signals to the computer's memory disk for astronomers to analyze later.

    Radio wavelengths are much longer than those of visible light, and the radio waves from deep space are always weak. To catch Radio wavelengths are much longer than those of visible light, and the radio waves from deep space are always weak. To catch these waves, radio telescopes usually have huge antennas. The sizes of most antennas in use today are around 50 to 300 metres in diameter. The antenna of FAST in Guizhou, China, the latest and largest radio telescope in the world, is 500 metres in diameter, as large as the size of 30 football fields.

    To avoid interferences, and keep the telescopes sensitive, radio telescopes are built in places where there are no human radio waves or electronic signals. For example, FAST is 5 kilometres away from the closest village and 25 kilometres away from the nearest town.

    Radio telescopes create pictures of the sky, not in visible light, but in radio waves. This is extremely useful, because there are objects that can't be seen, objects that we wouldn't even know without radio telescopes.

    There was a world's advanced robot exhibition in Moscow. Over 20 skilled robot performers from all over the world took part in the exhibition.

    The exhibition was opened by British-born Titan, a world-famous dancing robot that had performed together with artists. Besides its quick moves, the robot is also known for its stand-up comedy and beautiful voice.

    Robot Hespin, a life-sized humanoid robot can make others happy. The robot not only sings and dances but also acts as a museum guide. It's very impressive. It can even hold conversations with humans.

    Then there is Cubic, an ordinary boxy robot that has been created to make our lives easier. It can read the latest news, switch off lights, and order pizza. Cubic can hold basic conversations and tell jokes.

    South Korea's friendly robots not only dance but also clean floors. Germany's famous metal rock band performs wonderfully.

    Most of the robots seem to have some kinds of dancing skills. The organizers say that their main purpose is to create a meeting place or a global platform to enable the people of Russia to experience some of the world's most advanced robots.

    This is a street crossing. There are red and green lights at each corner. Drivers must watch the lights carefully.

    When there is a green light, the cars may go on. When there is a red light, the cars must stop.

    They must wait until the red light changes (变成)to green. Then they can go on. Sometimes the cars want to make a right turn or a left turn. They can make a right turn when the light is green or red. But they must wait until the green light is shining (闪亮) if they want to turn left. Some people are color-blind (色盲的). They can't see the difference (不同点) between red and green. These people mustn't drive, or there may be an accident (事故) .We must keep our street safe (安全的).