It's a popular belief that a fish's memory lasts for only seven seconds. It may seem sad to think that they don't remember what they've eaten or where they've been, and they don't recognize you or any of their friends — every moment in their life 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 a much better memory than we used to think. In fact, certain species of fish can even remember events from as long as 12 days ago.

    In the study, researchers from MacEwan University in Canada trained a kind of fish called African cichlids to go to a certain area of their tank to get food. They then waited for 12 days before putting them back in the tank again.

    Researchers used computer software to monitor the fish's movements. They found that after such a long break the fish still went to the same place where they first got food. This suggested that they could remember their past experiences.

    In fact, scientists had been thinking for a long time that African cichlids might have a good memory. An earlier study showed that they behaved aggressively（挑衅地） in front of certain fish, perhaps because they remembered their past “fights”. But until the latest findings, there was no clear evidence.

    Just as a good memory can make our lives easier, it also plays an important part when a fish is trying to survive in the wild.

    “If fish are able to remember that a certain area contains safe food, they will be able to go back to that area without putting their lives at risks,” lead researcher Trevor Hamilton told Live Science.

    For a long time, fish were placed far below chimpanzees, dolphins and mice on the list of smart animals. But this study has given scientists a new understanding of their intelligence.

    I've never been the kind of person to say, “it's the thought that counts” when it comes to gifts. That was until a couple of weeks ago, when my kids gave me a present that blew me away.

    For years now, I've been wanting to sell our home, the place where my husband and I raised our kids. But to me, this house is much more than just a building. In the front room, there's a wall that has hundreds of pencil lines, marking the progress of my children's growth. Every growth stage is marked in grey, with each child's name and the date they were measured. Most people I know have been featured on a wall like this, or at least had a wall like it in their home.

    Of all the objects and all the memories, it's this one thing in a home that's the hardest to leave behind. Friends I know have returned home after work only to discover their wall of heights has been freshly painted over. A new paint job wouldn't normally be greeted by tears, but erasing that evidence of motherhood hurts more than it should. Our kids grow in so many ways, but the wall is physical evidence of their progress, right there for everyone to see.

    Over the years, I've talked about how much I would hate leaving that wall behind when I moved, even though the last marks were made 10 years ago when my kids stopped growing. So one day, while I was at work, my children decided to do something about it.

    They hired Jacquie Manning, a professional photographer whose work is about capturing (捕捉) the beautiful things in life, from clear lakes and skies to diamonds and ballgowns. She came to our house while I was at work, and over several hours, took photos of the hundreds of drawings and lines, little grey fingerprints (手印), and old marks. Somehow, she managed to photograph all those years of memories perfectly. Afterwards, she put all the photos together into one image, transforming them into a beautiful history of my family.

    Three weeks later, my children's wonderful gift made its way to me – a life-size photo of the pencil lines and fingerprints that represents entire lifetimes of love and growth.

    PTSD(战后创伤) is sadly a common affliction(折磨) for many soldiers who have witnessed conflict, an invisible wound that continues to cause incredible suffering long after the guns have fallen silent.

    "A lot of us come home without realizing we are bringing the war home with us," said Josh Marino, a veteran (退伍兵)of the Iraq war who suffered the effects of PTSD of suicide .

    "I didn't want to deal with it anymore," Marino said. He wrote a goodbye note, grabbed a knife and went outside for a final cigarette in the rain. But then, from the deepest depth of despair came hope. Meowing out of the bushes next to him came a stray black and white kitten (小猫) which, according to Marino, "just walked up and started rubbing up against my leg and let me pet him. I came to life again and I broke down crying. I burst into tears."

    From this accidental encounter everything changed. Marino found a new purpose in life through the friendly cat, who he named Scout, and who he credits with saving his life. "I stopped thinking about all my problems, and started thinking about all his problems, and what I could do to help him, "Marino said. The bond between them was instant，but that wasn't the end of the story.

    Marino has made a video of his and Scout's remarkable story of healing and heartbreak which you can watch on the Internet. The story is dedicated to showing how animals can help humans through tough times, as well as humans can help them. It is a beautiful story that is sure to tug at your heart strings, showing just how powerful the bond between humans and animals can be. We love it, and we hope you do too!

    Western conservation groups are seeking stricter laws to deal with trade in endangered wildlife, but Dr. Paul Jepson warns that this isn't the best solution. He highlights the case of the Bali starling (八哥). Bringing in tougher laws created unexpected outcomes, which contributed to the bird's extinction in the wild in 2006.

    He said that the traditional law enforcement (执行) approach that outlawed (宣布……非法) ownership of the Bali starling in the 1980s and 1990s increased rather than reduced the demand for wild-caught Bali starlings. The bird has become a popular gift among the rich of Indonesia, who can gain more status by owning one.

    Instead, a case-by-case analysis might be needed. Last year, he said, a bird association set up a network of breeders (饲养者) among the owners of Bali starling on the island of Java. By introducing a "crowd-breeding" model, it transformed the bird into a species whose price and source of supply were publicly known. This lessened the status of keeping such birds and thereby reduced their profitability to black market suppliers.

    Another case was on Nusa Penida, an island southeast of Bali. A Balinese conservation group planned to release starlings on the island. Critics tried to block the plan, saying the island was outside the birds' native zone. Eventually, the Governor of Bali came up with a proposal. The starlings were given to a local temple as a ceremonial offering before they were released. This gave the Bali starling status as a "sacred bird", giving them protection under customary laws. Now the released starlings established a breeding population on Nusa Penida.

    Dr. Jepson commented, "I do not want to criticize the international approach seeking tighter law enforcement, but this case study shows we should not oversimplify how we respond to the problem of the wildlife trade. There is a growing body of evidence that shows more different approaches are sometimes needed to fit with the local social and political realities. We should tailor solutions on more of a case-by-case basis."

If you had to choose one word to describe Kevin,it might be "slow".He didn't learn his ABCs as fast as other kids.He never came first in the schoolyard races.However,his smile was bright and he showed great interest in everything.So when he discovered that Randy was putting together a boy's basketball team,Kevin immediately joined.

At practice,Kevin worked so hard that you'd have thought he was preparing for the NBA.And the whole team truly loved basketball.But just loving the game doesn't help you win.They lost every game that season by a very large margin(差距),except one...that night it snowed and the other team couldn't make it to the game.

At the end of the season,the boys unfortunately played against the first-place team.The game went pretty much as expected,and near the middle of the fourth quarter Kevin's team stood nearly 30 points behind.At that point,one of Kevin's teammates called time-out."Coach,this is our last game but Kevin has never made a basket.We should let him try," said the boy.With the game completely out of reach,the idea seemed reasonable.So every time Kevin's team had the ball,they would give it to Kevin.His first shot missed and he missed another shot again.This continued a few more times until the player from the other team grew wise.Instead of running off down the court,he threw the ball to Kevin who shot...and missed again.

Soon,all the players were circling Kevin,throwing the ball to him.The whole gymnasium thundered with the clapping,chanting,"Kevin!Kevin!" Finally,after amounts of tries,the ball went in.Kevin's arms shot high into the air and he shouted,"I won!I won!" The first-place team remained unbeaten,but on that evening,everyone left the game truly feeling like a winner.