The expression “a thirst for knowledge" may soon have a new meaning for millions of people who have no way to get clean water. Researchers have developed a book with specially treated pages that can turn dirty water into clean and drinkable water. They say their invention could improve the lives of many in the developing world.

    About 700 million people around the world are at risk of disease or even death because their drinking water is not clean. The water is polluted by harmful bacteria.

    The book contains 25 pages. Each page is about one millimeter thick. The pages contain very small particles (微粒) of silver. The pages can be used as filters（过滤器）to remove harmful microorganisms (微生物) that can pollute drinking water. The filter kills the organisms that pass throughit.

    Pictures on the pages show the dangers of dirty water and how to use the book for those unable to read. The pages aremade of filter paper. They are designed to be torn from the book. Water can bepoured through the paper to be cleaned.

    Ms. Dankovich, the inventor, says eachpage can treat up to 100 liters of water. She recently presented her invention at the meeting of the American Chemical Society in Boston, Massachusetts. She was asked whether she had considered adding classic literature on the book's pages.

    "The idea of classic texts—that's of interest maybe later. We have discussed a little bit more exciting text. But we really haven't had the time to go through that part," she says.

    Teri Dankovich and another researcher tested the drinkable book in Bangladesh, Ghana and South Africa. The tests proved to be successful.

    Water for Life, a non-government alorganization, has provided financial support for the project.

    As we all know, there are plenty of different parks to visit in the UK. All theme parks in Britain have cafes, restaurants, picnic areas and gift shops, so you'll still have plenty to see and do when you and the kids have been on enough rides. There are usually smaller “funfair” rides and games as well, so younger children won't get bored. Several theme parks also have other attractions next to them, e.g. water parks often open all year round, unlike the theme parks.

    Whenever you are in Britain, there's likely to be a theme park within one or two hours'drive, bus ride or train journey. Several theme parks even have accommodation (膳宿) so you can stay for a day for two if you want to make a trip into a short holiday.

    Prices for UK theme parks vary considerably; some have an entrance price which allows you to go on all the rides, while in others you have to pay for every ride individually. It can also make a difference whether you go during peak time or not. For example, tickets always cost more during school holidays and weekends than they do during the weekdays.

    Theme parks always get very busy during the summer months, so if you don't like crowds it's usually a good idea to go earlier or later in the year!

    If you're thinking of visiting a UK theme park, it's worth having a look for special offers on tickets. Products such as chocolate bars and cereals sometimes have “buy one get one free” offers on theme park tickets, so keep a look out in shops and supermarkets.

    As time went on, Philip's deformity was accepted like one boy's red hair and another's unreasonable obesity. But meanwhile he had grown horribly sensitive. He never ran if he could help it, because he knew it made his limp more noticeable. He stood still as much as he could, with his badly shaped foot behind the other. Because he could not join in the games which other boys played, their life remained strange to him; sometimes they seemed to think that it was his fault if he could not play football, and he was unable to make them understand. He was left a good deal to himself. He had been inclined to talkativeness, but gradually he became silent.

    The biggest boy in his dormitory, Singer, took a dislike to him, and Philip, small for his age, had to put up with a good deal of hard treatment. About half-way through the term there was a game called Nibs. It was a game for two, played on a table or a form with steel pens. Soon nothing was seen but boys playing this game, and the more skilful acquired vast stores of nibs. But in a little while Mr. Watson made up his mind that it was a form of gambling, and forbade the game. Then he ordered all the nibs in the boys' possession be handed in. Philip had been very skilful, and it was with a heavy heart that he gave up his winning; but his fingers itched to play still, and a few days later, on his way to the football field, he went into a shop and bought a pennyworth of J pens. He carried them loose in his pocket and enjoyed feeling them. Presently Singer found out that he had them. Singer had given up his nibs too, but he had kept back a very large one, called a Jumbo, which was almost unconquerable, and he could not resist the opportunity of getting Philip's Js out of him. Though Philip knew that he was at a disadvantage with his small nibs, he had an adventurous disposition and was willing to take the risk; besides, he was aware that Singer would not allow him to refuse. He had not played for a week and sat down to the game now with a thrill of excitement. He lost two of his small nibs quickly, and Singer was jubilant, but the third time by some chance the Jumbo slipped round and Philip was able to push his J across it. He crowed with triumph. At that moment Mr. Watson came in.

    "What are you doing?" he asked.

    He looked from Singer to Philip, but neither answered.

    "Don't you know that I've forbidden you to play that game?"

    Philip's heart beat fast. He knew what was coming and was dreadfully frightened, but in his fright there was a certain exultation. He had never been swished. Of course it would hurt, but it was something to boast about afterwards.

    "Come into my study."

    The headmaster turned, and they followed him side by side. Singer whispered to Philip:

    "We're in for it."

    Mr. Watson pointed to Singer.

    "Bend over," he said.

    Philip, very white, saw the boy quiver at each stroke, and after the third he heard him cry out. Three more followed.

    "That'll do. Get up."

    Singer stood up. The tears were streaming down his face. Philip stepped forward. Mr. Watson looked at him for a moment.

    "I'm not going to beat you. You're a new boy. And I can't hit a cripple. Go away, both of you, and don't be naughty again."

    When they got back into the school-room a group of boys, were waiting for them. They set upon Singer at once with eager questions. But he did not answer. He was angry because he had been hurt.

    "Don't ask me to play Nibs with you again,' he said to Philip. 'It's jolly nice for you. You don't risk anything."

    "I didn't ask you."

    "Didn't you!"

    He quickly put out his foot and tripped Philip up. Philip was always rather unsteady on his feet, and he fell heavily to the ground.

    "Cripple," said Singer.

    For the rest of the term he tormented Philip cruelly, and, though Philip tried to keep out of his way, the school was so small that it was impossible; he tried being friendly and jolly with him; he abased himself, so far as to buy him a knife; but though Singer took the knife he was not placated. Once or twice, driven beyond endurance, he hit and kicked the bigger boy, but Singer was so much stronger that Philip was helpless, and he was always forced after more or less torture to beg his pardon. It was that which rankled with Philip: he could not bear the humiliation of apologies, which were wrung from him by pain greater than he could bear. And what made it worse was that there seemed no end to his wretchedness; Singer was only eleven and would not go to the upper school till he was thirteen. Philip realized that he must live two years with a tormentor from whom there was no escape. He was only happy while he was studying and when he got into bed. And often there recurred to him then that queer feeling that his life with all its misery was nothing but a dream, and that he would awake in the morning in his own little bed in London.

    When I was growing up, Mother's Day was as important as Christmas.

    The energy around the house was always positive（积极的）, mostly thanks to my father who made sure that his kids appreciated their mother, We would clean the house, and Mum got breakfast in bed in the morning and didn't have to lift a finger all day. And in the evening, we went to a restaurant for a traditional Mother's Day dinner.

    What I learned from my father over the years, was that no matter what, he always put my mother before himself. He absolutely loved her and never let her forget that. And from my parents, I learned a thing or two about how to love.

    I maintain（保持） my father's Mother's Day tradition with my wife. Growing up, I learned that showing affection to the woman you love or who gave birth to you is an important part of life. You see, it goes both ways, and the love you have for your mother comes back to you again and again.

    Believing that and feeling it when you can may keep you from being lonely, even if your mum isn't close by or has passed away. There are a number of us who no longer have a mother in our lives, and truth be told, there are often times when I wish my mum were still here to comfort me. So instead, I remember the times she did just that. It makes me smile, and somehow, those memories of a more simple and loving life give me the comfort I'm looking for.

    My wife's mother is still around, however, and it's great to have that "mother energy" in my life still. Having this relationship with my mother-in-law is nice because it gives me someone to be there for on Mother's Day, and any other day of the year.

    If you are mum-less, you too should find a deserving woman in your life and celebrate Mother's Day with her. If you don't know anyone, there are plenty of lonely mums in rest homes who would enjoy your company for a couple of hours. The visit will make both of your days, and perhaps your lives, a little bit better.

When it comes to architectural accomplishments, humans like to think they stand at the top. That is to underestimate the astonishing achievement s of social insects; for example, white ants raise skyscraping nests. The true master builders of the insect world, however, are the hundreds of species of stingless bees.

In a new study, Ms. Di Pietro and her colleagues observed over 400 colonies of the stingless bee species in a large bee house in Brazil in 2022 and 2023. Around 95% of the colonies exhibited honeycombs（a structure made by bees） built up in horizontal layers（水平分层）, like tiered wedding cakes, while the rest adopted a spiral（螺旋的） structure.

Since the stingless bee shows a strong preference for a horizontal-layer honeycomb structure, it's surprising that spiral honeycombs occur. The team confirmed that there was no difference in the average cell-building rate between the two styles, and therefore no efficiency advantage.

In order to rule out a genetic explanation for the different styles, the researchers transplanted workers from colonies that built in one tradition to colonies that built in the other, having first emptied the host structures of their native adults. The imported workers soon switched to the local style, which was then continued by the colony's young insects as they eventually matured into workers.

Dr. Tom Wenseleers guessed that the bees may switch styles as a way of coping with the build-up of small construction errors made by their fore-runners. Such a process, in which multiple organisms indirectly affect each other's behavior through the traces they leave in their environment, is known as stigmergy（共识主动性）. The researchers later introduced a sign of spirals to the otherwise perfect horizontal-layer honeycombs, and found that it did indeed cause the bees to switch to building spirals.

These results suggest that stingless bees can pass on different building traditions across generations and individuals needn't be instructed by their peers. "The findings are the clearest demonstration of cultural differences naturally appearing in insects. Insect culture would once have been thought impossible," says behavioral biologist Andrew Whiten, who wasn't involved in the research. "Less than a century ago, culture was thought to be uniquely human."

If you're after a quick snap, if you're out and about, here are a few brilliant instant cameras to choose from.

Instax Mini 12

Made by Fujifilm, the Instax Mini series of cameras is ideal for taking quick snaps and getting high-quality credit card sized photos. The Mini also comes with built-in flash, a close-up lens (镜头) and selfie lens for taking those perfect shots.

The camera comes in a range of bright colours, including sky blue and clay white.

Polaroid Go

Famous for their cameras, Polaroid still makes instant cameras in the modern day, with a classic look. The Go comes with autofocus as well as a self-timer for effectively capturing the moment and producing quality Polaroid photographs for you to keep.

It also comes in a range of funky colors, if all black or white isn't your preference.

Instax Mini Evo

The Mini Evo combined camera and printer is a compact device with a 28mm lens that's capable of letting you review and edit photos before printing them.

Also featured is a back 2.7-inch LCD screen for viewing what you're shooting and the ability to print from your phone via Bluetooth.

Instax Mini 40

Coming just in a single but vintage black design, the Instax Mini 40 is a solid option for quick instant snaps, with a one-touch selfie mode and a more traditional looking camera, fixed with a 60mm lens.

It's also small enough to fit comfortably in your bum bag or pocket to take a quick snap if you're out and about.