There was a strange father, John Blake, from Michigan, who named his children after a computer software term. He told the local newspaper the US traditional way of adding “Junior” or “II” after a boy's name was too common. So, when his son was born last week, he decided on the name John Blake 2.0, as if he were a software programmer.

    Mr. Blake admitted that it took months to persuade his wife, Jamie, to accept the idea. Mrs. Blake said she asked several friends whether they could accept this name or not. “All the men,” she said, “felt the name was cool.” However，her women friends did not think so. “I think the women end up like it，”she said.

    Mr. Blake told the local newspaper he got the idea from a film called The Legend of 1900，in which an abandoned baby is given the name 1900 to remember the year of its birth. “I thought that if they can do it , why can't we?” he said. After little John version 2.0 was born, Mr. Blake even sent a celebratory e-mail to the family and friends, which was designed to look as if he and his wife had created a new software. “I wrote things like there are a lot of new features from Version 1.0 with additional features from Jamie,” he said. And he has already planned for his son's future. “If he has a child, he could name it 3.0,” he said.

    An old friend from California called from the airport to tell me that he had arrived. I was not able to leave the office, but I had made plans for his arrival. After explaining (解释) where my new house was, I told him that I had left the key under the doormat (门垫). Since I knew it would be pretty late before I could get home, I suggested that he make himself at home and help himself to anything that was in the refrigerator(电冰箱).

    Two hours later my friend phoned me from the house. At the moment, he said, he was listening to some of my records after having had a delicious meal. Now, he said, he was drinking a glass of orange juice. When I asked him if he had had any difficulty finding the house, he answered that the only problem was that he had not been able to find the key under the doormat, but luckily, the living room window by the apple tree had been left open and he had climbed in through the window. I listened to all this in great surprise. There is no apple tree outside my window, but there is one by the living room window of my next door neighbor's house!

    A lot of kids have dreams they will never achieve due to the limitations of their little bodies. They want to fly, or to become a dinosaur, or to learn how to shoot webs out of their fingers like Spiderman.

    Luka Tavcar, 12, has muscular dystrophy(萎缩) and is totally dependent on his wheelchair. Nevertheless, late last year, he had an inspired plan: to be photographed walking around and having fun.

    He approached Matej Peljhan, an amateur photographer and a psychologist at CIRIUS rehabilitation(康复) center near Ljubljana, Slovenia, where Luka is a patient.

    At first, Peljhan was perplexed. How could he photograph a boy who can not move or act in motion? "Luka wanted to see himself playing and having fun, but it seemed impossible," he says.

    Then Peljhan had a brainstorm: Luka could lie down on a piece of cloth and, with the help of an assistant, Peljhan would pose the boy as if he were jumping, climbing stairs, moving downhill on a skateboard, and playing basketball. Then Peljhan would shoot these images from above. The photos took about a month to produce; all were shot early this year.

    Peljhan, who lost his right arm and left eye as a child, says his disabilities motivated him to make the photographs. "I understand people with limitations," he says.

    He named the series the little Prince after the French story by Antoine de Saint-Exupery in which a boy teaches a man about trust, hope and friendship. Luka loves the photos.

    Peljhan himself understands what it is like to live with limitations- he lost his right arm and left eye as a child. "He wants to stay positive," the photographer explains. "Luka's imagination helps him forget his phisical limitation", says Peljhan. "He's fragile, but he can see the world differently."

How Much Can We Afford to Forget?

    In 2018, Science magazine asked some young scientists what schools should teach students. Most said students should spend less time memorizing facts and have more space for creative activities. As the Internet grows more powerful, students can access(获得)knowledge easily. Why should they be required to carry so much of it around in their heads?

    Civilizations(文明)develop through forgetting life skills that were once necessary. In the Agricultural(农业的)Age, a farmer could afford to forget hunting skills. When societies industrialized, the knowledge of farming could be safe to forget. Nowadays, smart machines give us access to most human knowledge. It seems that we no longer need to remember most things. Does it matter?

    Researchers have recognized several problems that may happen. For one, human beings have biases (偏见), and smart machines are likely to increase our biases. Many people believe smart machines are necessarily correct and objective, but machines are trained through a repeated testing and scoring process. In the process, human beings still decide on the correct answers.

    Another problem relates to the case of accessing information. When there were no computers, efforts were required to get knowledge from other people, or go to the library. We know what knowledge lies in other brains or books, and what lies in our heads. But today, the Internet gives us the information we need quickly. This can lead to the mistaken belief — the knowledge we found was part of what we knew all along.

    In a new civilization rich in machine intelligence, we have easy access to smart memory networks where information is stored. But dependency on a network suggests possibilities of being harmed easily. The collapse of any of the networks of relations our well-being(健康)depends upon, such as food and energy, would produce terrible results. Without food we get hungry; without energy we feel cold. And it is through widespread loss of memory that civilizations are at risk of falling into a dark age.

    We forget old ways to free up time and space for new skills. As long as the older forms of knowledge are stored somewhere in our networks, and can be found when we need them, perhaps they're not really forgotten. Still, as time goes on, we gradually but unquestionably become strangers to future people.

On paper, hydrogen (H2) looks like a dream fuel. Coal, oil, and natural gas produce carbon dioxide, which warms the earth when burned, Hydrogen produces pure water. Hydrogen packs more energy into less space than a battery (but certainly less than petrol) . Also, empty tanks (燃料箱) can be refilled with hydrogen much faster than refilling empty batteries with electricity.

While in practice, things are trickier. Storing a meaningful amount of hydrogen gas requires pressing it several hundred-fold. Changing it into the liquid form is another option, but it should be cooled to-253C. Both processes require a heavy and strong tank. While a 700 bar tank is acceptable for a city bus or a truck, adapting it for use in small vehicles is very difficult because the pressure during refilling would be too great.

The solution? Powerpaste.

A German team of researchers, led by Marcus Vogt, have come up with an interesting "powerpaste", which can store hydrogen energy at atmospheric pressure, ready for release when needed. It is so named because it comes in tubes and looks like toothpaste (牙膏) , not in its traditional form of gas.

The main ingredient (原料) of the paste is magnesium hydride, a substance that reacts with water to form hydrogen. The escaped hydrogen can then be directed into a fuel cell, where it reacts with oxygen from the air to produce electric power.

Refueling is very simple, as instead of going to a filling station, drivers and riders can simply replace an empty tube with a new one and refill the water tank.

Given that powerpaste only begins to break down at temperatures of around 250℃ it remains safe even when a vehicle stands in the baking sun for hours.

However, we will have to be patient. Just because researchers have succeeded in developing a new fueling way does not mean that we can expect to see such vehicles on the road anytime soon. It will indeed be several years before this concept is turned into reality.

There was an encounter that later sparked scientists' investigations into using jellyfish as a greater source of food, as well as a potential ingredient in medicines and nutraceuticals. In the summer of 2013, while Stefano Piraino was wandering along the rocky shoreline, he noticed a washed-up jellyfish. Then, he tore off a piece and put it in his mouth. It was salty, crunchy and crispy from the sun. "It was very tasty, " remembers Piraino, a zoologist. After a few days of lying on the shore, their stinging cells(刺细胞)are deactivated, Piraino explains. Still, he warns that people should not eat jellyfish straight out of the sea, because raw jellyfish contains bacteria that can cause food poisoning. 

Recently, there have been numerous reports of jellyfish blooms—seasonal events where there is a large and sudden increase in jellyfish numbers. These population explosions break the balance of ocean ecosystems, and have the potential to harm biodiversity and reduce fish stocks. 

Some scientists, such as Piraino, believe one solution is broadening our palates(口味)since the world is in urgent need of sustainable food resources. Jellyfish can be integrated into traditional recipes and local cuisine. Not only are they high in protein, but the microalgae inside the cells of some jellyfish are rich in fatty acids. In fact, jellyfish is already eaten across Asia. In China, jellyfish has been eaten for more than 1, 000 years, with jellyfish salad a popular delicacy. 

Jonathan Houghton, a senior lecturer in marine biology, believes that jellyfish can be a better source of collagen(胶原蛋白). There are a number of companies already using jellyfish as a substitute(替代品) for cow and pig collagen, which is often used in medical treatments for humans. One British company says collagen from jellyfish offers a better choice, because their collagen can work with a wide variety of human cell types.