One in every 121 Americans share the last name"Smith". It is also the most used last name in the UK, Canada, Australia and New Zealand, a study finds.

The study also finds that many people in Asia share the same family names. In China,there are about 2,000 family names in use today, but about 50% of all Han Chinese people share the same 19 family names! The most used family name is Wang. One in every 13 people have"Wang"to be the family name. In South Korea, one in five are named"Kim", and inVietnam,25% of people are named"Nguyen".

Where do these most used last name s come from? Some people may have last name s from an occupation or the name of a place."Cook"and"Hill"are two of the most common(最常见的) family names."Cook"comes from the job people do and"Hill"is from the place people live in. Some common last names come from the people in their families. Often a son gets his last name from his father by putting "s" or "son" at the end of his father's given name.Thomson, Wilson, Roberts and Davis are all common last names.

Purple, green, orange, red. animals have a lot of beautiful and different colors. These colors are important to them. Some animals use the colors to make their enemies (敌人) afraid. And sometimes their enemies can not see them clearly because their colors are like some other things. Other animals use the colors to find partners. But how do animals have their colors?

Food gives them colors

Some animals get pigments (色素) from their food. For example, flamingos eat a lot of shrimp or algae. These things have a red-orange pigment. The pigment gives flamingos a pink color. The more they eat, the pinker they get.

Body gives them colors

Animals' body parts, like feathers, scales (鳞片), hair and skin, have special structures. They reflect (反射) light to make animals colorful. This is called structural colors. For example, blue morpho butterflies (蓝闪蝶) have beautiful scales on their wings. This gives them a bright blue color.

Did you know?

Structural colors don't fade (褪色). People use the idea to make special clothes and paints.

Robots can help us in many ways. And Topeliffe Primary School is doing something new by helping autistic（患自闭症的）children through robot friends. These robots can dance，play games and tell stories. They can do Tai Chi as well!

Dr Guldberg，a teacher from University of Birmingham，said，"Studies show that autistic children often feel safe with computers and robots. So we wonder how robots can help the children to communicate with others. For example，robots can act as their friends and listen to them at school. "

Ian Lowe，a teacher from Topcliffe Primary School，teaches about 30 autistic children. He said，"The robots are very smart at helping autistic children with their learning. In the future we hope they can help with learning at home. "

And the students love them. Seven﹣year﹣old Joshua says he likes playing games with the robots. Daniel and Kevin say they like to watch the robots dancing. And Stephen says he likes Robert Max when it tells him stories. 

In a way，the robots are helpful for these autistic children to express（表达）their ideas. 

Every year, millions of birds are killed or hurt when they fly into buildings. Why does this happen?  Birds are flying into windows and tall buildings that are all covered by glass.

Many birds fly from one place to another. Most of the time, they live in the wild, such as forests and wetlands.  They might see small trees and flowers inside a window and want to rest on these plants. The birds do not know there is glass between them and the plants.  

Some birds fly at night. They use the moon and stars to help guide them in the right direction. Tall buildings with lights on at night can confuse（迷惑）the birds.  The birds see the light, but they cannot tell that the light is coming from inside a building. They fly toward the light and crash into a building. On many mornings, there might be several dead birds lying on the ground.

  Many office buildings now turn off their lights at night. This helps reduce the number of birds that fly into buildings and it also helps save energy.

Most kids love sweets. Why？When we eat or （喝）sweet foods, the sugar enters our blood and influences our brain. It （留下）god feelings with us, making us want more. In fact, all （美味的）foods do this, but sugar has an especially strong power. That's why doctors （总是）advise us to Early humans often had very little food, so our （身体）learned to store a lot of sugar as fat. In this way, we （节省）energy for when there was no food. But today, most people have more than enough. So it may now be harming our （健康）.

It's certain （更少的）sugar. The trouble is that, in today's world, our foods are filled with sugar. Although our （餐）look better, large amounts of sugar are often added. To solve the problem, we should take more exercise, （两次）a week at least. And remember, next time you want some cookies, eat an apple instead.

Brainstorming is the practice of coining up with ideas or solutions. But we do have some rules to follow for successful brainstorming.

Focus on quantity （数量）over quality. When it comes to brainstorming, the more ideas, the better.

Don't worry about the quality of your ideas for now. Remember that your goal is to come up with as many ideas as possible. Even if none of them are perfect, you'll still have many creative ideas to use for your final plan.

Encourage big or unusual ideas. Although unusual ideas may not be immediately practical, just creating those ideas gives your brain training. It can also help to produce creative solutions that are hard to come up with.

Don't say no to the ideas of others. You can put together the best parts of different ideas to create new, even better ones. Even if you're not brainstorming as a group, you should still think about sharing your ideas with others and asking them for their advice.

You don't have to regard yourself as a very creative person to come up with excellent ideas and solutions at once. Even if you don't find the perfect solution, just practicing it can help to improve your creativity. Put these tips together and you are sure to come up with some great ideas.