I first came across the concept of pay-what-you-can cafes last summer in Boone, N.C., where I ate at F.A.R.M (Feed All Regardless of Means) Café. You can volunteer to earn your meal, pay the suggested price($10) or less, or you can overpay—paying it forward for a future customer's meal. My only regret after eating there was not having a chance to give my time. So as soon as Healthy World Café opened in York in April, I signed up for a volunteer shift(轮班).

    F.A.R.M and Healthy World are part of a growing trend of community cafés. In 2003, Denise Cerreta opened the first in Salt Lake City. Cerreta now runs the One World Everybody Eats Foundation, helping others copy her pay-what-you can model.

    “I think the community café is truly a hand up, not a handout,” Cerreta said. She acknowledged that soup kitchens(施粥所) have a place in society, but people typically don't feel good about going there.

    “One of the values of the community café is that we have another approach,” she said. “Everyone eats here, no one needs to know whether you volunteered, overpaid or underpaid.”

    The successful cafés not only address hunger and food insecurity but also become necessary parts of their neighborhood – whether it's a place to learn skills or hear live music. Some teach cooking to seniors; some offer free used books. Eating or working there is a reminder that we are all in this world together.

    My 10 am—1pm shift at World-Healthy-Café began with the café manager — one of the two paid staff members. Our volunteer crew wasn't the most orderly, but we managed to prepare and serve meals with a lot of laughs in between. At the end of my shift, I ordered my earned meal at the counter, together with other volunteers. After lunch, I walked out the door, with a handful of new friends, music in my head and a satisfied belly and heart.

     Some people make you feel comfortable when they are around. You spend an hour with them and feel as if you have known them half your life. {#blank#}1{#/blank#} .

    Here are several skills that good talkers have. If you follow the skills, they'll help you put people at their ease, and make friends with them quickly.

    First of all, good talkers ask questions. {#blank#}2{#/blank#} . One well-known businesswoman says, “At business lunches, I always ask people what they did that morning. It's a common question，but it will get things going.” From there you can move on to other matters—sometimes to really personal questions. {#blank#}3{#/blank#} . Second, once good talkers have asked questions, they listen to the answers .This point seems clear, but it isn't. Your questions should have a point and help to tell what sort of person you are talking to. And to find out, you really have to listen carefully and attentively.

    {#blank#}4{#/blank#} . If someone sticks to one topic, you can take it as a fact that he's really interested in it. Real listening also means not just listening to words, but to tones of voice. If the voice sounds dull, then, it's time for you to change the subject.

    Finally, good talkers know well how to deal with the occasion of parting. If you're saying goodbye, you may give him a firm handshake and say, “I've really enjoyed meeting you.” {#blank#}5{#/blank#} . Let people know what you feel, and they may walk away feeling as if they've known you half their life.

A. Real listening at least means some things.

B. You can become a popular person.

C. Almost anyone, no matter how shy he is, will answer a question.

D. And how he answers will let you know how far you can go.

E. If you want to see that person again, don't keep it a secret.

F. It's polite to listen to others with a smile.

G. These people have something in common.

Everyone loves a hot shower, except maybe your skin and hair. As it turns out, hot water dries out skin and leaves hair dry and easily broken, Sejal Shah, MD (Doctor of Medicine) in New York City, told Women's Health. And if you dye (染)your hair, the color is likely to fade faster once the water gets steamy. To make matters worse, by making your skin lose natural oils, hot showers—above 99 degrees Fahrenheit—may bring about health problems. You may not like it, but the showers temperature that offers the greatest hair and skincare benefits is, well, cold.

Cold showers “strengthen the contractile fibers around pores(毛孔), muscles, and hairs which improves the firmness of skin,” says Carl Thornfeldt, MD with over 30 years of skin research experience. Though many people believe hot showers open and clear pores, it's actually wiser to close them. “Closing pores helps keep pollution from getting into the skin, at least temporarily,”

The benefits of cold showers are numerous, but surely we can't be expected to stand under cold water shivering every day especially in winter--not to mention that too cold (below the body's average temperature of 96.6 degrees Fahrenheit) is also bad. Fortunately, Dr. Thornfeldt recommends a happy medium. “The best solution is to take a warm, not too hot shower and then finish off with cold water for the last few seconds to still gain the rewards of the cold water,” he says.

That doesn't sound too unbearable. Considering the fact that our beloved, steamy showers may cause so much damage to skin and hair, it's best to switch to slightly warm temperatures to avoid losing natural oils and drying out, especially in winter when indoor heat is already sucking moisture(水分) out of skin. So, when the main part of an extremely comfortable warm shower is complete, finish off with a cool splash. Your hair and skin will thank you!

    Four years ago, we asked ourselves: what if we could create a shopping experience with no waiting in lines and no checkout? Or could we create a physical store where customers could simply take what they want and go? Our answer to those questions is Amazon Go, where you could experience the idea of "just walk out shopping".

    Amazon Go is a new kind of store with no checkout required. We created the world's most advanced shopping technology, so you never have to wait in line. With our "just walk out shopping" experience, simply use the Amazon Go app to enter the store, take the products you want, and go! No lines, no checkout.

    Our checkout-free shopping experience is made possible by the same types of technologies used in self-driving cars: computer vision, sensor fusion, and deep learning. Our “ just walk out technology ” automatically detects when products are taken from or returned to the shelves and keeps track of them in your virtual cart. When you have done shopping, you can just leave the store. Shortly after, we'll charge your Amazon account and send you a receipt.

    We offer delicious ready-to-eat breakfast, lunch, dinner, and snack options made fresh every day by our on-site chefs and favorite local kitchens and bakeries. Our selection of food stuff ranges from bread and milk to cheeses and locally made chocolates. You'll find well-known brands we love, plus special finds we're excited to introduce to customers. For a quick home-cooked dinner, pick up one of our chef-designed Amazon Meal Kits, and you can make a meal for two in about 30 minutes.

    Our 1,800-square-foot shopping space is conveniently compact, so busy customers can get in and out fast. It is located at 2131, 7th Ave, Seattle, WA, on the corner of 7th Avenue and Blanchard Street. All you need is an Amazon account, a supported smart phone, and the free Amazon Go app.

    Amazon Go is currently only open to Amazon employees in our testing program, and will be open to the public soon.

    Snorkelling in Silfra

The clear water at this UNESCO world heritage(遗产) site in Thingvellir National Park will leave you speechless. It is one of the highest rated dive sites in the world. During this journey, you will snorkel within a crack between the Eurasian and American continents. You'll experience truly amazing views of the colorful underwater landscape, marine life(海洋生物), and geological formations. Silfra's water is fresh and drinkable at around 2℃ - 4℃ all year round. Visibility can reach more than 100 meters, and swimming often feels more like flying.

    This trip is for anyone who knows how to swim and is up for a unique adventure. We offer transportation with a pick-up in Reykjavik, and provide you with a dry suit. The total length of the tour is approximately five hours, and includes in-water snorkelling lasting around 30 minutes. We'll guide you through the main Silfra Big Crack, Silfra Hall, Silfra Cathedral and Silfra Lagoon.

Included:

    All necessary snorkeling equipment;

    Hot drinks and food;

    Silfra entrance fee of 1,000 ISK.

    Availability: All year at 09:00 and 15:00. Pick-up in one hour before.

    Requirements:

    Participants need to complete the Silfra medical statement before the tour.

    Divers must:

    Be at least 18 years old (young people under 18 years old need a signature from their legal guardian), and the maximum age is 65 years old;

    Be able to communicate in English.

    Be physically fit;

    Not be pregnant;

    Not be under the influence of alcohol or drugs;

    Sign a medical form.

A living robot has been created out of frog skin cells. Xenobots, named after the frog species Xenopus laevis that the cells come from, were first described last year. Now the team behind the robots has improved their design and demonstrated new capabilities.

To create the xenobots, Michael Levin at Tufts University in Massachusetts and his colleagues obtained tissue from 24-hour-old frog embryos after very small physical operation. Where the previous version relied on the contraction of heart muscle cells to move them forward by pushing off surfaces, these new xenobots swim around faster. They also live between three and seven days longer than their previous generation, which only lasted about seven days, and have the ability to sense their surroundings to some extent, turning red when exposed to blue light.

"The fundamental finding here is that when you free skin cells from their normal context, and you give them a chance to build other things than what they normally build," says Levin. "To me, one of the most exciting things here is that they are plastic. This idea that even normal cells, not genetically modified, are in fact capable of building something completely different."

Because they are created from cells, the xenobots eventually break apart and are totally biodegradable, says team member Douglas Blackiston, also at Tufts University. He therefore hopes that they can be used for biomedical and environmental applications.

Previous attempts at creating living robots, such as a wirelessly controlled cockroach, have involved dealing with live animals, raising ethical concerns. Xenobots differ from these because they are made entirely of living cells. "The approach here is maybe ethically the least problematic because everything starts with cells. They have no neurons, so it's not an animal," says Auke ljspeert at the Swiss Federal Institute of Technology at Lausanne, who wasn't involved in the research. "It's really cells, so I find it maybe the cleanest way."