Many scientists find that colors can change people's feelings. It's very interesting. Some colors can make people feel relaxed, and some colors can make people feel nervous. Now, this kind of knowledge is being used in many places. For example, school walls are always painted green because green makes students feel relaxed. It is also good for the students' eyes. Some books are also green or light blue for the same reason. Restaurant owners not only have to know how to make food, but also have to know how to make money. Here are some things they've learned from scientific studies. The color red makes people hungry. Many fast food restaurants have red furniture or walls. Soft colors like pink and light blue make people feel relaxed, so they spend more time eating. Loud music may be nice at first, but it soon makes people want to leave. Hard seats also make customers want to eat quickly and leave. Many restaurants, especially fast food restaurants, use this knowledge to make customers eat faster.

New App Helps People Remember Faces

    Large gatherings such as weddings and meetings can be socially Q flooded with people. Learning people's names only adds to the stress. A new facial-recognition app could come to the rescue, but experts suggest people should be careful while using it.

    The app, called SocialRecall, connects names with faces through smartphone cameras and facial recognition, avoiding the need for formal introductions. "It breaks down these social barriers we all have when meeting somebody, "says Barry Sandrew, who created the app and tested it at an event attended by about 1, 000 people.

    After receiving an invitation to download SocialRecall from an event organizer, the user is asked to take two selfies and sign in through social media. At the event, the app is active within a previously set geographical area. When a user points his or her phone camera at an attendee's face, the app identifies the person, displays the person's name, and links to his or her social media information. To protect Privacy, it recognizes only those who have agreed to use. And the app's creators say it automatically removes users' data after an event.

    Ann Cavoukian, a expert who runs the Privacy by Design Center of Excellence praises the app's creators for these protective measures. She added, however, that when people choose to share their personal information with the app, they should know that "there may be unexpected results down the road with that information being used in another situation that might come back to bite you."

    The start-up project has developed the app for people who suffer from prosopagnosia, or "face blindness, "a condition that prevents people from recognizing people they have met. To use this app, a person first receives an image of someone's face, from either the smartphone's camera or a photograph, and then tags it with a name. When the camera spots or recognizes that same face in real life, the previously entered information is displayed. The collected data are stored only on a user's phone, according to the team behind the app.

Have you ever used the? The Post-it Note is a common Object that is of great use in our every day life. It is not only helpful for students but also a necessary office supply (用品)

The start of the Post-it Note can date back to the 1970s when it was Post-it Note accidentally :前vented by a scientist named George Little. One day, while George Little was working in his laboratory, he developed a special adhesive (粘合剂) by accident that was very sticky but could be easily peeled off without leaving any residue (残留物). Interested in this

discovery, he began doing tests with different materials and designs to create a writable, sticky note that could be easily stuck to and taken off from different surfaces. After having tried several months and failed, he finally came up with the design for the Post-it Note.

The new invention was made of a kind of yellow, writable paper that was covered with the special adhesive. When the Post-it Note was first introduced to the public, it was a quick hit. People quickly realized it could be used in many ways and it brought them great convenience. So the Post-it Note quickly became a popular office supply. Now it has already become an indispensable object in homes and offices around the world No other object can take its place.

A man and his wife were very poor. They kept hoping for new clothes and good food. The man enjoyed eating and he especially liked pancakes. One night a young woman came to their house and told them that she would let them have three wishes. They could wish for anything they wanted.

The man had just finished eating a little bread for his dinner and he was still hungry. He said,"I wish I had a big pancake!"

Suddenly there was a pancake on his plate.

"You fool!" his wife cried. "You could wish for a house full of wonderful food, but you wished for a pancake. I wish that pancake was on the end of your foolish nose."

Immediately (立即) the pancake was on the end of the man's nose.

Then the man and his wife started blaming (责备) each other. "It's your fault!" the man cried. "No, it's your fault!" she answered. What could they do? The pancake was still on the husband's nose.

"Oh!" the wife cried. "I wish none of this had ever happened!"

Immediately the pancake was gone, and the man was saying, "I'm still hungry. How I wish I had some pancakes!"

But of course nothing happened.

That day was a very good day. The volunteers who visited an orphanage(孤儿院) now became the best friends each

other. The four persons were Li Hui, the reporter of Jing Newspaper, Zhao Qiang and Huang Jian, reporters of Chongqing Television Station, and me. 

According to our experience of driving in the disaster area, it would be OK to drive in the morning, but the road was dangerous in the afternoon. So this morning we got offat 6:00 am. It is about 40 kilometers aim place. It would take not  more than one hour normally. However, because of poor road conditions, we tried twice but failed to go through. We had to stop driving to wait for road repairing. It was very dangerous to park on the road in the mountain. To be honest, my    experience in the disaster area were over load(超负荷). I almost couldn't stand. But one thing had been supporting me, I had been very grateful to have such a chance to help the people of disaster area, to have such a chance to share my love.  When we took two vehicles(卡车) supplies to the orphanage, the leader of the orphanage Mr. Lang with 31 children was too excited to say anything. 

People around the world work together to help our planet on Earth Day, April 22. But in fact, lots of people protect the Earth all year long. They are Earth heroes(英雄). And some kids do, too. We have four kids here, telling you that you can help even if you are a child.

Saving the frogs

John is from the USA. He always loves frogs. When John was 5, he learned their living places were in danger. So John started a group, For the Love of Frogs. They sold toy frogs to collect money to help frogs. John is now 10 and the group has more than $ 20,000 to protect frogs!

Growing right

Mandy lives in a city in India. She saw a wasteland near her house at 15. She turned it into a garden. She used native plants that lived or grew around her city. Native plants could make insects like butterflies and animals come to her area.

Mandy is now 18. She is teaching people about native plants." The way to reuse the wasteland is not just to plant any tree," she said." It is to make sure that you grow the right plants in the area."

Cleaning up

Zhang Min, 13, and Zhang Jie, 15, live in a city in China. To fight plastic pollution, they made a plan. They wanted to clean up plastic waste in the Pearl River.

Zhang Min and Zhang Jie put up posters at school to make people care more about plastic waste." You need to have people talk to one another," Zhang Jie said," Everyone can do something to help."