There is a popular belief that goldfish only have a three-second memory. But a 15-year-old schoolboy from Adelaide has just finished an experiment to tell us that it is not true. He shows everybody that the goldfish is smarter than we think.

    "I don't believe that they had a three-second memory because animals need their memory, so they build up over time a knowledge of where the food is," said Rory Stokes, a student at the Australian Science and Mathematics School.

    He did the experiment in a small tank(鱼缸)of goldfish. "I decided to get a bit of red Logo and just feed them next to that. Every day I'd put it in and spread food around it." He said.

    "At first they were a bit scared of it, but by the end of the three weeks, they were actually almost coming before I put the food in."

    After leaving the fish alone for a week, Rory placed the red Logo block in the tank again.

    "They remembered perfectly well," he said.

    "They actually had a time faster than the average(平均)of the three feeds before I left."

    The goldfish showed that they not only could store information, but also had the ability to get it back at a later date.

    Culum Brown, a researcher at Sydney′s Macquarie University, has studied fish behavior for more than ten years.

    He says his studies of Australian native fish show fish are smart animals that know how to avoid enemies and catch food like any other animal.

    "The thing that I really liked about Rory′s experiment is that he not only got that classical conditioning going but the fact that he could get thorn next just to that specific coloured marker. I thought it was really good." He said.

    What will our homes be like in the future? Here are some predictions:

    Want to take a shower when you get home? You'll be able to let your smart water heater(热水器) to start heating up when you're on your way home..

    Did I turn off the oven? Did I close the window? Everyone may have a moment like that. But in the future, your home will check these for you.

    In your home of the future, all of your devices (设备) can work together to make your life more comfortable. When you turn on the lights in the morning, your windows will open at the sometime. The lights will slowly turn off by themselves after the sun appears.

    Your home may have dangers. The hackers (黑客)could open your door and cause a mess at your home through your phone or other devices. Your home will tell you about it, but you can't arrive in time. So people will have to be careful of their personal information.

    As space science develops, man has learned more and more about space. Space is not only amazing but also dangerous. While working in space, spacemen are facing danger as well as success.

    Scientists have found out that the radiation（辐射）is the greatest danger to spacemen in space. When spacemen are working in space, they are in danger of the radiation from the sun and other stars, which is bad for their health. The harm of the radiation won't be found until their children even grandchildren are born. Some special medicine may work a little, but no really effective medicine has been found so far.

    Space rubbish is also thought to be a great danger to spacemen. It's reported that there were 9,000 man-made things flying in space. About 30% of these are satellites, 10% are spaceships, and the rest are space rubbish. An explosion（爆炸）in space in 1999 made a cloud of 300,000 fragments, each at least 4mm in size. A small piece of these even knocked a spaceship window and caused some damage（损坏）.

    Scientists are watching and reporting any possible danger all the time. They are working to deal with space rubbish. Although space is really dangerous, it interests many people on the earth. In the near future, it may be possible for people to spend a few days in a space hotel. We may even choose to leave the earth and live in space in a few years. So we should do something to help improve the space environment.

    Can you imagine a pair of shoes that could tie themselves? All you have to do is put them on and push a button. Well, this idea is becoming a reality. The shoe company Nike created the self-tying shoe! This idea first came from the film Back to the Future II, Nike has been working for years to create a shoe that can do this in real life. They have finally done it with Nike HyperAdapt 1.0.

    So how does it work? According to Nike, the shoe is “powered by an underfoot-lacing mechanism(脚下系带装置) small motor that has the power to lace the shoes, All you have to do is put them on, and at first, the shoes are very loose(松的). But then you can push the "+" perfect fit for you. To take them off, all you have to do is push the "-" button, and the shoes will be easily off.

    They haven't been widely released to the public yet, and the price of the shoes is quite high.