There is an old saying about volunteer work that goes like this: “ No one can do everything, but everyone can do something.”

    Today, many people volunteer their time and energy to help others. There are a lot of ways to meet other people's needs. For example, some volunteers provide help after a disaster. Others are happy to get dirty while repairing homes or planting trees or flowers in poor neighborhoods. Young people see suffering and loneliness around them and find ways to help. And history lovers help archeologists(考古学家) search for ancient objects to help deepen our knowledge of the past.

    Volunteers work in many areas around the world, including Haiti. More than four years have passed since a 7.0 earthquake shook the nation. The exact number of people who died may never be known. Thousands of survivors of the Haitian earthquakes still live in temporary shelters. Last year, former American President Jimmy Carter and his wife Rosalynn joined five hundred volunteers in the town of Leogane to build houses.

    Organizations do not have to be large to get volunteers. An activist group in Dharamsala, India is a good example, Jodie Underhill from England arrived in northern India several years ago. She planned to volunteer for an environmental project. She could almost not believe how much rubbish was ruining some of the area's most beautiful sights. Jodie Underhill learned about how to deal with the rubbish while taking part in other volunteer projects. But soon enough she formed her own group, Mountain Cleaners. Jodie Underhill says the work is very hard. But she praises the group's efforts as a wonderful experience. The young Englishwoman says the Indian media started calling her “Garbage Girl”. And she says she was pleased with the name.

    American teenagers also volunteer in many ways .

    Books at Amazon: Best sellers of the month—Feb, 2018

    Freshwater by Akwaeke Emezi—February 6, 2018

    Hardcover: $15.91Audio CD: $29.99

    An extraordinary novel. Freshwater explores the amazing experience of having another self. It centers around a young Nigerian woman, Ada, who develops separate selves within her as a result of being born “with one foot on the other side.” Freshwater is a sharp call of a rare way of experiencing the world, one that shows how we all construct our identities.

    Milk and Honey by Rupi Kaur—February 16, 2018

    Hardcover: $ 18. 00 Paperback: $ 8.99 Audio CD: $8.99

    A collection of poetry and prose (散文)about survival. About the experience of violence, abuse(虐待), love, loss, and femininity (女性). It is split into four chapters, and each chapter serves a different purpose. Deals with a different pain. Heals a different heartache. Milk and Honey takes readers through a journey of the most bitter moments in life and finds sweetness in them because there is sweetness everywhere; if you are just willing to look.

    Educated by Tara Westover—February 13, 2018

    Hardcover: $ 16.80 Paperback: $ 28.00 Audio book: $6.00 Audio CD: $8.99

    An unforgettable biography about a young girl who, kept out of school, leaves her survivalist family and goes on to earn a PhD from Cambridge University. Educated is an account of the struggle for self-invention. It is a tale of fierce family loyalty, and of the sadness that comes from severing one's closest ties.

    Force of Nature by Jane Harper—February 20, 2018

    Hardcover: $17.10 Paperback: $ 23.41 Audio book: Free Audio CD: $ 34. 15

    An attractive novel from the author of the Sunday Times top 10 best seller. Five women go on a hike. Only four return. When five colleagues are forced to go on a corporate retreat in the wilderness, they reluctantly pick up their backpacks and start walking down the muddy path. But one of the women doesn't come out of the woods. And each of her companions tells a slightly different story about what happened.

    Many leading AI researchers think that in a matter of decades, artificial intelligence will be able to do not merely some of our jobs, but all of our jobs, forever transforming life on Earth.

    The reason why many reject this as science fiction is that we've traditionally thought of intelligence as something mysterious that can only exist in biological organisms, especially humans. But such an idea is unscientific.

    From my point of view as a physicist and AI researcher, intelligence is simply a certain kind of information-processing performed by elementary particles(基本粒子) moving around, and there is no law of physics that says one can't build machines more intelligent than us in all ways. This suggests that we've only seen the tip of the intelligence iceberg and that there is an amazing potential to unlock the full intelligence that is potential in nature and use it to help humanity.

    If we get it right, the upside is huge. Since everything we love about civilization is the product of intelligence, amplifying(扩大) our own intelligence with AI has the potential to solve tomorrow's toughest problems. For example, why risk our loved ones dying in traffic accidents that self-driving cars could prevent or dying of cancers that AI might help us find cures for? Why not increase productivity through automation and use AI to accelerate our research and development of affordable sustainable(可持续的) energy?

    I'm optimistic that we can develop rapidly with advanced AI as long as we win the race between the growing power of our technology and the knowledge with which we manage it. But this requires giving up our outdated concept of learning from mistakes. That helped us win the race with less powerful technology: We messed up with fire and then invented fire extinguishers, and we messed up with cars and then invented seat belts. However, it's an awful idea for more powerful technologies, such as nuclear weapons or superintelligent AI—where even a single mistake is unacceptable and we need to get things right the first time.

    The extreme hot weather often makes people restless with sweats in summer. Even though people are annoyed by it, experts suggest that summer is the best season to give out your body's poisonous matters and refresh your energy.

    One popular choice is hot-stone massage(按摩). Therapists(理疗师)use smooth and heated stones, usually river rocks, to massage certain parts of the body, or set them on key points of the body. The warmth of the hot stones will promote blood circulation and also help muscles relax, while sweating is also believed to be good for letting out the body's poisonous factors.

    Another popular choice is hot-stone baths. The hot-stone bath will help the body give out poisons and humidity(湿气) that build up during the last winter. Summer is the best season to form a good body. Rather than use water or steam to heat and wash the body, people simply wear a coat or something comfortable, and then lie on heated stone tablets made of hot stones, which are warmed to around 45^oC. The body will gradually warm up and blood circulation will also be improved. More sweat will come out quickly. The sweat is smooth and fresh, not smelly like that released after sports activities. Such baths bring a number of health benefits, such as anti-aging, improved blood circulation and stress relief. The slimming effect of dieting can even be promoted.

    It dates back to ancient times to use hot stones for treatment, but the modern hot-stone massage generally owes to Mary Nelson, a native of Tucson, Arizona, America, whose trademark is "La Stone Therapy".

    The therapy is earning a good fame and popularity with many people, especially those who are often seated in cool rooms with air-conditioners. The hot-stone therapy can help cure many illnesses, back pain included.

    In our increasingly fast-paced, technology-driven world, most adults do not get the 8-10 hours of sleep every night. Things are even worse for those with young children. A recent study showed that 86% of parents in the UK complain of tiredness and about 26% get less than 5 hours of sleep every night. To give tired parents a little relaxation from their tight schedules (时间表), David Lloyd Clubs, a chain of gyms and fitness centers in Europe, has introduced a napping (小憩)class!

    As the name suggests, the hour-long group class, described as a way to " refresh the mind, improve moods, and even bum the odd calorie (卡路里)", does not involve any hard exercise. Instead, the members are guided through 15 minutes of light stretching (伸展)to help them relax. Then, they are encouraged to lie under the blankets of a comfortable bed, cover their eyes with an eye mask, and take a nap for 45 minutes. With music playing in the background and the room set to the perfect temperature, they can be assured of the best possible sleep. The class is now being offered at just one place. If popular, they will be expanded (延伸)to other David Lloyd Clubs.

    Do you know the good points of nap? A study conducted by Pennsylvania's Allegheny College found that midday naps not only help participants feel well-rested, but also enable them to deal with stress better. A follow-up study carried out at the University of California at Berkeley concluded that a 45-minute nap in the middle of the day helps to improve the learning abilities. The good news is that you do not have to make a trip to the U. K. to join this latest exercise fashion. You can get involved with the comfort of your own bed. So, go ahead and encourage your entire family to try a napping class.

A team of biologists (生物学家) recently studied wildlife in the forests of northern Ecuador. While doing so, they made a surprising discovery: a Mindo harlequin toad (明多斑足蟾). The creature hadn't been seen alive in 30 years. The scientists couldn't believe their eyes. "It took our brains a while to believe it was a Mindo harlequin toad," says Melissa Costales, a conservation biologist from University of New Brunswick.

The Mindo harlequin is the latest harlequin toad species "to come back from the dead," says Costales. Since 2003, eight others have been found, three of them in Ecuador.

Until recently, 13 of the 25 species of harlequin toads in Ecuador had gone unseen since the 1980s or early 1990s. Scientists thought most of them had been killed by a disease called chytrid (壶菌). This illness is especially harmful to the harlequin toad.

Costales says the Mindo harlequin toad may have developed a resistance (抵抗力) to the disease. That would explain the toad's reappearance. And it could spell good news for other harlequins. Since discovering the first one, Costales's team has found five more. They were all tested for chytrid. None had the disease. But that doesn't mean the survival of the species is guaranteed (保证), Costales says. The harlequin toad is still endangered.

Costales is developing a conservation plan with a zoology museum in Ecuador. She wants to make sure the Mindo harlequin toad doesn't fall back into extinction. "Each rediscovery gives us a second chance to develop better conservation plans," she says. "Not every day do we have the chance to rediscover a species that we believed to be extinct."