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 a child, I was really afraid of the dark and of getting lost. These fears were very real and caused me some uncomfortable moments.

Maybe it was the strange way things looked and sounded in my own room at night that scared me so much. There was never complete darkness, but always a streetlight or passing car lights, which made clothes on the back of a chair take on the shape of a wild animal. Out of the corner of my eye, I saw the curtains seem to move when there was no wind. A very low sound in the floor would seem a hundred times louder than in the day. My imagination (想象) would run wild, and my heart would beat fast. I would lie very still so that the “enemy” would not discover me.

Another of my childhood fears was that I would get lost, especially on the way home from school. Every morning I got on the school bus right near my home. That was no problem. After school, though, when all the buses were lined up along the street, I was afraid that I would get in the wrong one and be taken to some other strange places. On school or family trips to a park or a museum, I wouldn't let the leaders out of my sight.

    Perhaps one of the worst fears of all I had as a child was that of not being liked or accepted by others. Being popular was so important to me then, and the fear of not being liked was a serious one.

    One of the processes growing up is being able to realize and overcome our fears. Understanding the things that scared us as children helps us achieve greater success later in life.

    Most people know that listening to music when they are feeling down or depressed can encourage their spirits.

    However studies have also shown that music, especially certain tones can reduce stress. Music can change brainwave patterns, deepen breathing, and bring on a totally stress-free and more open mindset（心态）. Using music to relax when considering a particular problem may not only raise your mood, but also could help you reach that "a-ha"moment and find a solution.

    Music has also been shown not only to make you feel good, but also, to be a great motivator. For example, during exercise, listening to music can keep you going, or get you to exercise more by helping you to ignore negative feelings of tiredness and focus on the pleasurable feelings you get from being absorbed in the music.

    Music is mainly used to record emotion. When we listen to a piece of music we share the artist's feelings on a visceral（本来的）level. That can be sad, and who among us hasn't put on a painful love song to share in the misery after a bad break-up? On the contrary, we can share in the delight of songs of joy and happiness, or any song or piece of music that reminds us of a particular happy time in our past.

    So next time you are feeling down, put on Beethoven' s Ode to Joy, I bet you will feel a lot better about whatever it was that was bothering you!

    We moved to Elmont in 1956. I was 4 years old. Elmont was a wonderful place to grow up. There were lots of kids, great schools and we had a big yard. My father, Nicholas Denaro, believed that grass was not just to look at, but that children were meant to play on it. We played games and badminton there. A white fence separated our backyard from a small wood. My friends and I jumped the fence and entered the woods.

    My father had the most amazing hand. He could fix anything. He gave those amazing hands to his son, my younger brother, Frank, who also became handy around the house. But my father saved his green fingers for me. He grew flowers, tomatoes, strawberries and figs（无花果） and he shared his love of gardening with me.

    Fourteen years ago, I went to a local nursery and bought a fig tree for Dad for Father's Day. My mother, Bridget Denaro, called it the best gift I could have given him. He planted it exactly in the middle of the front yard.

    He loved that tree and enjoyed delicious figs every year, except just after Sandy hit in 2012. He was so disappointed when cold weather just after the super storm froze all the remaining figs.

In 2015, my father died of aspirating pneumonia(呼吸性肺炎) at 97. We sold our family home of 61 years last year. We left behind Dad's tree, full of figs waiting to ripen. We considered taking it with us, but decided that his Father's Day fig tree belonged to Elmont. The new owner generously allowed me to take some branches so that I could have a precious reminder of my much-loved father and the Elmont home.

    A mother goat is able to pick out her own baby from its voice alone by the time the kid is just five days old.

    Researchers from University of London played kids' bleats to female goats and studied their responses. They were surprised to find that the animals were able to pick out their own kids' voices.

    “A mother and the kid rely a lot on smell to recognize one another and, in the wild, during the first week of their lives, the animals hide in grass and don't call much. It's a strategy they use to avoid enemies,” Dr Elodie Briefer, who led the research, explained to BBC News. “The mother call to the kids when she want them to come and feed, so we expected that kids would recognize the mothers' voices.” In fact, this was the case for deer, which also use this hiding strategy, although they do not belong to the same family of species as goats.

    She and her team recorded and played back young kids' calls to the female goats and recorded their responses. She explained, “Even when the calls came from kids that are five to six days old, we could see the mothers responding more to the voices of their own babies.” Hearing the voice of their own kids, the females would look towards the speaker that the sound was coming from, moving around and calling in response.

    The scientists say that understanding how goats behave and communicate is very important. “This helps us understand just how smart these animals are,” said Dr. Briefer. “Farmers might be able to change their way to raise goats considering this natural behaviour.”

Things to do in Cabo Corrientes, Jalisco, Mexico

    Majahuitas Island Tour

    Duration: 6h 30m

    Let yourself be spoiled by the nature in the Majahuitas Island (Natural Reserve) while you do different beach and sea activities, such as Snorkeling (潜游), Kayak (划独木舟)Tour and more. Eight delicious options from our menu will please your taste during lunch time, also your favorite drink will be prepared in our bar.

    Las Marietas Eco Discovery

    Duration: 6h

    Snorkel, swim, and kayak through the beautiful rock formations around the Marietas Islands. Beloved by Jacques Cousteau for their rich marine life and clear waters, this underwater playground is an ideal place to spend the afternoon.

    Follow up your snorkeling adventure with a guided kayak trip. Learn about the islands' geologic past and keep your eyes peeled for migrating whales and playful groups of dolphins. Back on the boat, have a tasty deli-style lunch featuring delicious sandwiches and salads, or kick back with a drink from the open bar while your crew set a course for your return to port.

    Yelapa & Majahuitas Catamaran Tour

    Duration: 7h+

    Set sail from Puerta Vallarta aboard a luxurious catamaran with the vast Pacific Ocean ahead and a refreshing sea breeze surrounding you. Spend your morning snorkeling and exploring the peaceful cove of Majahuitas. This coral reef and tropical fish-filled coastline is only accessible by boat, making it one of Puerto Vallarta's best-kept hidden treasures.

    Sayulita Escape

    Duration: 3h

    Hop on a powerful UTV (utility task vehicle) to explore Sayulita, a hip and relaxed beach town not far from Vallarta. Ride over muddy back roads and a riverbed to reach the small community famous for its laid-back atmosphere. Soon after hitting the main road, your guide turns onto one of the dusty forest paths. Pass by farms, fields, and a riverbed before reaching an isolated beach. When you are ready, a picnic lunch, open bar, and knowledgeable crew await your return to the catamaran.