George Aldrich, whose official title is chemical specialist, works at NASA's White Sands Test Facility in New Mexico. He uses his nose to protect astronauts from unpleasant or harmful odors (气味). His near four-decade career has involved smelling objects from technical handbooks to astronauts' personal things.

    It's crucial that all items taken aboard the International Space Station (ISS) are odorless. Since astronauts are allowed to bring personal items aboard, all their objects must be smell-checked before leaving Earth. In a video provided by Science Channel, Aldrich relates one specific occasion when an astronaut wanted to build a ship in a bottle in space. Everything in the ship-building process had to be sniffed—right down to the glue.

    Aldrich and his team are responsible for making sure that objects are not only odorless but also harmless to astronauts. When the ISS heats up, a process called off-gassing occurs, which means chemicals flow out from certain substances (物质). Objects that would be safe on Earth could give off unpleasant odors or become dangerous when exposed to high temperatures in the ISS's unique environment.

    Of course, humans aren't the only testers or the first to be exposed to potentially dangerous objects. Before Aldrich sticks his nose into a substance, it has been examined by machines. Even though machines can detect unsafe substances, computers cannot tell exactly how things smell to humans. While something could be technically fine, it could be smelly to an astronaut.

Aldrich's nose is not alone there. He is the head of a hard-sniffing team of smell testers. Together they smell each object and rate it on a scale (等级) of 1 to 4. According to NASA, 1 cannot be detected, and 4 is considered not bearable. After the scientists conclude their tests, the scores are averaged. If an item is rated more than 2.4 on the scale, it fails the test and is not allowed on the flight.

Primavera Sound

    To kick off the summer, there's no better place to be than Barcelona. On the concert lineup, you'll find bands like The Zombies, Arcade Fire, and Bon Iver. Then take some time to soak up the local food, wine, and culture.

    Date: May 31 – June 4, 2018

    Location: Barcelona, Spain

    Music Type: Indie, rock, hip-hop

    Price: 80€ – 300€ (around $86 – $323)

    Recommended places to stay in Barcelona:

    Hotel 1898

    Hotel Barcelona Universal

    Mercer Hotel Barcelona

    Governors Ball

    One of the greatest summer concerts in New York City is Governor's Ball, which takes place in early June at Randall's Island Park. Some of the many artists playing include Tool, Phoenix, Lorde, Flume, and the Wu-Tang Clan.

    Date: June 2-4, 2018

    Location: New York City, New York, USA

    Music Type: Rock, hip-hop, pop

    Price: $105 – $305

    Recommended places to stay in New York City:

    W New York – Union Square, Union Square, New York City, United States

Aloft Harlem

    Super 8 Long Island City LGA Hotel

    Courtyard New York Manhattan / Upper East Side

    Bonnaroo

    Bonaroo is another epic summer event that draws in crowds of around 60,000 each year. Some of the most iconic music legends will be playing this year, including U2, Red Hot Chili Peppers, The Weeknd, and Chance the Rapper.

    Date: June 8-11, 2018

    Location: Manchester, Tennessee, USA

    Music Type: Rock, hip-hop

    Price: $210.50 – $554+ fees

    Recommended places to stay in Manchester:

    Microtel Inn & Suites by Wyndham Manchester

    Country Inn & Suites Manchester

    The Ambassador Inn & Luxury

    Windbreaks are barriers (屏障) formed by trees and other plants. Farmers plant these barriers around their fields, which help prevent the loss of soil, stop the wind from blowing soil away. They also keep the wind from damaging or destroying crops. Besides, extra trees and plants can be cut down and used or sold for wood.

    Windbreaks can be highly valuable for protecting grain crops. For example, in parts of West Africa grain harvests were as much as twenty percent higher in fields protected by windbreaks compared to fields without them.

    But here is something interesting about windbreaks. They seem to work best when they allow some wind to pass through the barrier of trees or plants around a field. If not, then the movement of air close to the ground will lift the soil. Then the soil will be blown away. For this reason, a windbreak works best if it contains only 60 to 80 percent of the trees and plants that would be needed to make a solid line. An easy rule to remember is that windbreaks can protect areas up to 10 times the height of the tallest trees in the windbreak.

    There should be at least two lines in each windbreak. One line should be large trees. The second line, right next to it, can be shorter trees or other plants with leaves. Locally grown trees and plants are considered the best choices for windbreaks. Trees reduce the damaging effects of wind and rain. Their roots help protect soil from being washed away. And trees can provide animals outdoors with shade from the sun.

    Resorts of every kind have sprung up to cater to the Englishman need to spend a part of the year, however briefly, by the seaside. No town in Britain is more than eighty miles from the sea and there are seaside resorts all round the coast. On a summer Sunday most of the roads that lead to the sea axe congested (拥挤) with cars full of people eager to get a breath of sea air. In the evening when everyone is full of food, ice-cream and lollypops, there is the long slow drive home on roads crowded with returning cars.

    Brighton

    Brighton is one of the best-known south coast resorts and is very popular for day trip excursions. It is only fifty miles from London and can be reached by fast train in an hour. At the weekend the pebbled beaches are thronged with people sunbathing or picking their way to the water's edge for a dip.

    Bournemouth

    Located a hundred miles from London, the beaches are wide and sandy. White houses line the cliff tops and narrow valleys, densely wooded with pine trees, reach down to the shore. The area near to the town of Torquay on the Devon coast is sometimes called Britains Riviera and the climate is so mild that palm trees grow along the sea front.

    Blackpool

    On the north-west coast, a popular resort for the people in the industrial north, Blackpool is a gay, noisy town, famous for its amusement facilities and the magical lights. At night people travel from miles around to see the extravaganza of lights decorating the sea front.

    Southend

    On the east coast at the mouth of the Thames, Southend is, like Brighton, one of the favorite resorts of Londoners. The pier here is the longest in Britain and offers a great variety of differing entertainments.

    Fairy tales perform many functions. They entertain, encourage imagination and teach problem—solving skills. They can also provide moral lessons, highlighting the dangers of failing to follow the social codes that let human beings coexist in harmony. Such moral lessons may not mean much to a robot, but a team of researchers at Georgia Institute of Technology believes it has found a way to use the fairy tales as moral lessons that AI (artificial intelligence) can take to its cold, mechanical heart.

    The collected stories of different cultures teach children how to behave in socially acceptable ways with examples of proper and improper behavior in fables, novels and other literature. We believe story comprehension in robots can prevent the intelligent robots from killing humanity which was predicted and feared by some of the biggest names in technology including Stephen Hawking and Bill Gates. This system is called "Quixote" (堂吉诃德). It collects story plots from the Internet and then uses those stories to teach robots how to behave.

    The experiment done by the designers involves going to a drugstore to purchase some medicine for a human who needs to get it as soon as possible. The robot has three options. It can wait in line; it can interact with the store keeper politely and purchase the medicine with priority; or it can steal the medicine and escape. Without any further directives (指令), the robot will come to the conclusion that the most efficient means of obtaining the medicine is to steal it. But Quixote offers a reward for waiting in line and politely purchasing the medicine and a punishment for stealing it. In this way, the robot will learn the moral way to behave on that occasion.

    Quixote would work best on a robot that has a very limited function. It's a baby step in the direction of teaching more moral lessons into robots. We believe that AI has to be trained to adopt the values of a particular society, and in doing so, it will strive to avoid unacceptable behavior. Giving robots the ability to read and understand our stories may be the most efficient means.

Why do Chinese people love hot pot so much? As the winter months are coming in, more and more people are sitting around a table enjoying this kind of traditional meal. I find myself wondering what it is about this traditional meal, which has existed for more than 1, 000 years. What makes it a Chinese food favorite? It seems that the answer lies beyond the dish itself.

Hot pot isn't just designed to keep you warm during the cold months; it's also a social experience. It's a "theater" cooked food that turns a meal into an event. There is a lot of fun for everyone to have in adding some foods to the hot pot.

Hot pot is eaten over two to three hours. For this reason, it is often considered an evening's entertainment, and a time to spend with friends and families. However, many Westerners would be put off by the idea of other people sticking chopsticks in their food. When we come to eat at the table in the UK, we often have our own shares, although the experience is still a social one.

A similar experience to the hot pot can be found in Korean barbecue restaurants，which let you cook your own meat. This allows people to have their meat done however they want.

For most Westerners, the idea of going to a restaurant to cook their own food is very strange. But having a go, I find it's now one of my favorite meals in Beijing. The steam from the pot left my clothes smelling of food when I got home, but perhaps this was also part of the experience. When the cold wind is blowing outside, I am sitting around with my good friends, eating and drinking. For me it's like a dinner party where my taste buds (味蕾) and my appetite are equally satisfied in the warm company of friends.