【推荐3】Many have heard shark fin soup. This famous and expensive dish is especially popular in Southern China. But do you realize that you are killing a whole shark each time you enjoy a bowl of shark fin soup?

When people catch sharks, they cut off fins and throw the sharks back into the ocean. This is not only cruel, but also harmful to the environment. Without a fin, a shark can no longer swim and slowly dies. Sharks are at the top of the food chain in the ocean's ecosystem. If their numbers drop too low, it will bring danger to all ocean life. Many believe that sharks can never be endangered because they are the strongest in their food chain. But in fact, around 70 million sharks are caught and traded in this industry every year. The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.

Environmental protection group around the world, such as WildAid and the WWF, are teaching the public about "finning" they have even asked governments to develop laws to stop the sale of shark fins. So far, no scientific studies have shown that shark fins are good for health, so why eat them? Help save the sharks!

It’s believed that fish can’t remember anything for longer than seven seconds. It may seem sad to think that every moment in their lives would be like seeing the world for the first time. But don’t be so quick to feel sorry for them. A new study has found that fish have much better memories than we used to think.

In the study, researchers from Mac Ewan University in Canada trained a kind of fish called African cichlids to go to a certain area of their tank to get food. They took the fish out and then waited for 12 days before putting them back in the tank again. They found that after such a long break the fish still went to the same place where they first got food.

In fact, scientists had been thinking for a long time that African cichlids might have a good memory. But there was no clear evidence (证据) until the latest findings.

Just as a good memory can make our lives easier, it also plays an important part when a fish is trying to live in the wild. “If fish are able to remember that a certain area contains (容纳) safe food, they will be able to go back to that area without putting their lives in danger,” lead researcher Trevor Hamilton told Live Science.

So next time you are watching your pet fish from outside the tank, perhaps you should feel closer to them—they may remember who you are.

【推荐2】Where in the world can you take an hour’s train ride, and pass a forest, a London street, a scene from the Wild West, and a burning building that never burns down? There’s only one place and that’s Hollywood, in California. The scenes you see from the tourist train are film sets（布景）in the Universal Studios, one of the oldest and largest movie companies in the USA.

A visit to Universal Studios brings back memories of great days of Hollywood, the films and the stars. But they are only memories. Hollywood isn’t quite the same as it used to be.   Costs have gone up and confidence has gone down. Movie-makers are afraid to spend their money on expensive new ideas. Instead, they repeat old ones.

The film industry is changing fast. Teenagers still go out to the movies. The theatre is a good place to meet friends away from home. But older people mostly stay at home to watch series,   like Dynasty, which have become as important to Hollywood as expensive movies. These “soap operas”, as they are called, show rich, powerful families living in beautiful homes and wearing beautiful clothes. But the actors and actresses are nearly all middle-aged, like many of the people who watch them.

Though it is soap operas that are keeping the film-makers of Hollywood in Business, big films are still being made in America. But more and more of them are made outside Hollywood. New York is the most important new center, but there are many others as well. Movie-makers have realized that they don’t need Hollywood any more. Modern cameras and real houses instead of expensively made copies in a studio. Other states, especially Florida and Texas, are working hard to take the film business away from California. They are offering better working conditions and lower cost.

But Hollywood is fighting back. The state of California is trying hard to keep its best-known industry.

【推荐3】The traditional Chinese lunar calendar divides the year into 24 solar terms（节气）. The solar term culture is still useful today to guide people’s lives. People eat special foods, do cultural activities and even have healthy living tips with each solar term at present. Here are different ways to know Summer Solstice（夏至）.

Summer Solstice, the 10th solar term of the year, falls on June 21 this year. On the Summer Solstice, daylight lasts the longest for the whole year in the northern earth. How long is the longest day in China? According to the expert, it lasts nearly 17 hours. After this day, daylight hours get shorter and shorter. And temperatures become higher and higher in the northern part of China.

There is a saying in Shandong province, “Eat dumplings on the Winter Solstice and noodles on Summer Solstice.” People in different areas of Shandong province eat chilled noodles（冷面）on this day. Other people around China, including those in Beijing, also have a tradition of eating noodles. This tradition is still in our life today, with some exciting activities.

Summer Solstice is the longest day of the year and marks（标志）the first day of summer. You can take some time to enjoy the warmth and joy in the coming summer.