Grandparents are respected in many human societies. But telling stories about old times and overfeeding grandchildren seem like human qualities. Are these classic grandparent behaviors really limited to humans?

Do any animals know their grandparents the way people do?

For most species on Earth, the answer is certainly " No" . " Usually, there aren't grandparents around anymore when an animal is born,"  said Mirkka Lahdenpera, a biologist at the University of Turku in Finland. " Even if an animal's life span does overlap (重叠) with its grandparents', most species spread out to avoid competing for resources, so the chance of running into a grandparent is slim." 

But there are a few clear exceptions, primarily among mammals (哺乳动物) that live in close social groups. In troops of langur monkeys in India, older females lived together with their daughters and grandchildren. The grandmother langurs defend the group's babies against attacks and even give their own grandchildren special treatment.

Many whale species, too, travel in family groups that include both grandmothers and grandchildren.

Elephant herds are also famously matriarchal. They are led by a grandmother, who can live to around 80 years old, and are generally made up of her daughters and their young. The females in a herd form close bonds and work together to raise their young.

Lahdenper found that the babies of young mothers were eight times more likely to survive if their grandmothers lived near them than if they didn't. When the young mothers were older and more experienced at raising babies, this beneficial grandmother effect disappeared even if the actual grandmothers were still around.

Indeed, most evidence for the benefits of grand parenting comes from mammals. But in 2010, researchers found that in troops of insects called gall-forming aphids, older females defend their relatives after they've stopped reproducing (繁殖).

And what about grandfathers? Studies of humans in recent decades have shown that a living grandfather can improve a person's mental health and other indicators of well-being. But there's no evidence of that in the animal kingdom. Male animals rarely socialize with their own children, let alone any grandchildren.

This month, we went on a five day trip to Xishuangbanna, a beautiful place in the south of Yunnan Province. The weather there is hot and wet. There a {#blank#}1{#/blank#} many kinds of plants and animals. I want to i {#blank#}2{#/blank#} some interesting things we saw to you during our trip.

In the jungle(丛林), we saw a twining(缠绕的)plant. These P {#blank#}3{#/blank#} grow when seeds-seeds mainly from banyan tees (榕树)are moved by animals or wind to some other trees. These seeds gradually grow, developing their own aerial (空气的) roots. Little by lite, they will get themselves around the host tree and f {#blank#}4{#/blank#} kill it, just like a snake kills its enemy.

A {#blank#}5{#/blank#} thing we learned is that when a tree gets big and strong, some of its aerial roots will grow into the ground and develop into a new tee, just like the way cell division (细胞分裂) works. The w {#blank#}6{#/blank#} tree will look like a small forest. I think this is quite a {#blank#}7{#/blank#}.

In the forest, you will sometimes find some red leaves among the green leaves. Why is that?

One reason is that the sunshine is very strong in Yunnan. The trees n {#blank#}8{#/blank#} use all of their leaves in order to do photosynthesis (光合作用) and grow, so the color of some of the leaves c {#blank#}9{#/blank#}to red.

We really enjoyed our trip to Yunnan. We learned a lot about n {#blank#}10{#/blank#} and had a rally fun time. I hope we can take more trips like this in the future.

①Everybody enjoys acts of kindness (善.举). But can you explain why? Some people think kindness is something out of love and care, while others believe it is just a tool to make us more popular. But research shows that being kind can activate (激活) an area of the brain called Striatum. Research also shows that kindness improves people's moods(情绪). But why and how does it happen? Here are a number of different ways.

②Firstly, being kind can make someone smile. If you see yourself smile in a situation, people around may be smiling too, especially for your close friends and family. A kind act makes someone who is sad feel better. It can also make ourselves feel good.

③Secondly, being kind starts or develops a social connection with others. Kind acts like buying someone a present make friendships stronger. Research has shown that spending money on others may help you get a stronger feeling of happiness than spending it on yourself.

④ Thirdly, in another research, even children in their first year of secondary school know how being kind makes them feel happy. If one person is kind, he or she makes others in the group kind. It also lifts everyone's spirits.

⑤Lastly, the story doesn't end here. Being kind may improve your mood, but research has also shown that if you're in a good mood, you can act much more kindly. This makes it a wonderful two-way relationship, doesn't it?

First Man is a picture book and it tells the story of Yang Liwei flying into space.

Yang Liwei is an astronaut. He was born on June 21st, 1965 in Huludao, Liaoning. He took the Shenzhou 5 spaceship and entered (进入) space in 2003. He is famous as China's first man in space.

To remember China's first trip to space, the picture book First Man was born. By reading the book, readers are able to know the travel in space. With beautiful pictures and the exciting story, the book tells readers about space science in an interesting way.

There is a surprise (意外,惊喜) in the book—a picture of a rabbit looking at the moon. China is looking forward to standing on the moon. With the development (发展) of science and technology (科技), the dream may come true soon.

Many cities in the world have underground,such as London,Paris,New York and so on.

The London underground opened in 1863 and it is the oldest underground railway system in the world.Beijing subway opened in 1969.On the wall of some stations in Beijing,there are some pictures of blue and white porcelain.The underground in Athens opened in 2000 and some of the stations are like little museums.You can make a special trip just to look at them because they show their cultures.Paris and Moscow are famous for their beautiful stations,but they don't run for 24 hours.While New York subway never closes,so you can take it at any time of the day or night.

Now people like to use this transport because they can avoid the heavy traffic and move between different places of a city quickly.

To celebrate the 50th anniversary of the Van Gogh Museum, the museum has worked with the Pokemon Company to hold {#blank#}1{#/blank#} amazing event. They hope the event will help young people learn about Vincent van Gogh's art. The event started on September 28th and{#blank#}2{#/blank#} ( run) until December 7th, 2024. 

As one of {#blank#}3{#/blank#} (popular) places in Amsterdam, the Van Gogh Museum has a large {#blank#}4{#/blank#} (collect) of works by Vincent van Gogh, {#blank#}5{#/blank#} (include) more than 200 paintings, almost 500 drawings and over 700 letters. Emilie Gordenker, General Director of the museum said, "This event will allow young people to get to know Vincent van Gogh's art and life story in a {#blank#}6{#/blank#} (complete) new way. We will use many years of educational experience to create a special experience for {#blank#}7{#/blank#} (child) and many others at the Van Gogh Museum. "

There are many activities across the museum during the event. Six paintings mix Pokemon characters into Van Gogh's paintings. For example, Pikachu {#blank#}8{#/blank#} (show) in a work that is inspired (启迪) by Van Gogh's Self-Portrait with Grey Felt Hat from 1887. Children over 6 years old can take part in an adventure activity{#blank#}9{#/blank#} (discover) the museum and the stories behind the paintings. {#blank#}10{#/blank#} Van Gogh lived in the distant past, visitors show deep interest in him. 

Step into the world of Vincent van Gogh and Pokemon through these surprising activities.