Have you ever wondered when dogs first became “man's best friend” and the world's favourite pet? If you have then you're not alone. When and where dogs first began living side-side with humans are questions that have stirred hot debate among scientists. There are a few hard facts that all agree on. These include that dogs were once wolves and they were the first animal to be domesticated(驯养) by humans. They came into lives some 15000 years ago, before the dawn of agriculture.

    Beyond that, there is little agreement. The earliest bones found that are unquestionable dogs and not wolves date from 14,000 years ago. However, 30,000-year-old skulls have been discovered in France and Belgium that are not pure wolf and some scientists think could be dogs.

    With such puzzling evidence, many scientists are now turning to DNA to find out when and where dogs were first domesticated. In one research project, tens of thousands of blood samples have been taken from street dogs around the world. The plan is to compare them with those of wolves. It's even possible to analyse DNA from ancient bones. Tiny pieces of the 30,000-year-old skulls mentioned earlier are currently being studied, and another DNA study has already shown that ancient dogs preserved in the Alaskan ice-fields evolved from Asian wolves, not American ones.

    Indeed, the ancient DNA may turn out to be more informative than the DNA of living dogs. Because dogs have accompanied humans around the world for thousands of years, their current distribution may tell us very little of their origins. This is why different groups of scientists believe that dogs variously originated in eastern Asia, Mongolia, Siberia, Europe or Africa.

    But why were the animals domesticated in the first place? The most recent theory is that dogs domesticated themselves, initially living in and around our ancient villages to eat any food thrown out. Today, this is a way of life still shared by three -quarters of a billion unowned dogs worldwide.

    A “virtual (虚拟的) cocktail” glass that lets you change the flavor (味道) of your drink using your Smartphone has been developed by scientists.

    Offering a customizable (定制的) range of drinks and tastes, the Vocktail can change a glass of water into a cocktail at the press of a button. The world's first technology tricks your brain into thinking it is experiencing a specific flavor by fooling your senses of sight, smell and taste.

    Developed by researchers at the National University of Singapore, the glass' three sensory components are controlled via a Smartphone App. Because the software can combine a number of smells, colors and tastes, the Vocktail can create almost any flavor.

    Developer Nimesha Ranasinghe said: “Our approach is to increase drinks flavor experience by overlaying outer sensory stimuli (刺激物). For example, in the Vocktail we overlay color, taste and smell sensations to create an adjustable flavor experience. Flavor is mainly how we feel food and that is achieved through the use of these senses. Therefore, by changing the color of the drink, using different smells and changing the taste through electricity, we are able to copy the flavor of a drink without it actually changing the liquid.”

    The glass houses three fragrance containers connected to micro-air pumps. The pumps release smell that change your feeling of the drinks, flavor. For example, a lemon fragrance will trick your brain into believing it is tasting lemon-flavored drink.

    On the outside edge of the glass are two electrode strips (电焊条) that send electric pulses into your tongue to stimulate your sense of taste and flavor differs with different pulses.

    China's hot word, tuhao, may be in Oxford English Dictionary.

    In Chinese, tu means rude and hao means rich. In recent years, people use this term to describe those who spend money in an unreasonable way. The word became more popular with Apple's gold-colored iPhone, which is loved by China's rich people. The color became known as “tuhao golden”. The word is now often used to refer to people who have money but lack taste.

    There are two other Chinese hot words: dama and No Zuo No Die, which may also be taken in the dictionary. Dama, meaning middle-aged women, was first used in the Western media by the Wall Street Journal. Thousands of Chinese women were buying a large amount of gold when the gold price had gone down. Another phrase No Zuo No Die, meaning if you don't do stupid things, they won't come back to bite you, is also very popular. Other words, such as Maotai, Chinglish and dim sum have also been included in the dictionary.

    BBC World News recently made a special program called “Tuhao, let's be friends!” “The frequent use of Chinglish by foreign media suggests that foreign people are looking more to the lifestyle and popular culture of China,” says Zhang Yiwu, professor of Beijing University.

    What does this trend suggest about the Chinese language's influence?

    Xing Hongbing, a professor from Beijing Language and Culture University (BLCU) said “These show that Chinglish is now being accepted by the rest of the world and they play important roles in daily life of Chinese. Behind these Chinglish words and phrases are the Chinese culture. They are reflections of the changes and trends in the Chinese society and they help people from other countries to understand what's happening in China.”

    I got into the teaching profession purely by choice. I was then in 9th grade when my mathematics teacher asked me to take a class for a few students to whom the subject seemed difficult. And believe me, I enjoyed the entire teaching session. I never knew teaching would be so interesting. I loved my freshmen and was delighted to teach my so-called students who came up with lots of good questions.

    After my post-graduation, I worked as a software developer with a public sector(部门) in Bangalore for a few years. But I realized that no job could provide me with the satisfaction that I experienced while teaching and training. I always wanted to connect with a wider group of people. In fact, I felt it was a timely realization for me to choose the teaching profession. I applied to a few colleges, and finally I was chosen as a lecturer, and I had to lecture graduate and post-graduate students in a college.

On the first day, I was nervous thinking that I had to teach the senior classes. But now I can say that giving lectures was one of the best experiences of my life. I was a Computer Science and Information Technology lecturer, but I tried to help my students with subjects that were not within my domain(范围). It was a new feeling to me every morning before I went to the classes. I used to feel energized and excited thinking that the class would be lit up with bright faces to greet me, "Good morning, Madam."

    To me each day was a new beginning, with new feelings, new experiences and new queries(疑问). I loved to explore their young minds and read their inquisitive faces when a particular topic seemed tough. It was extremely challenging to motivate them to participate, think critically, question and also respect others' points of view. Though few things never seemed easy, it was extremely exciting to assure them that they really can. That is the reason I love to teach.

                                        Do dogs understand us?

    Be careful what you say around your dog. It might understand more than you think.

    A border collie named Rico recognizes the names of about 200 objects, say researchers in Germany. The dog also appears to be able to learn new words as easily as a 3-year-old child. Its word-learning skills are as good as those of a parrot or chimpanzee(黑猩猩).

    In one experiment, the researchers took all 200 items that Rico is supposed to know and divided them into 20 groups of 10 objects. Then the owner told the dog to go and fetch one of the items and bring it back. In four tests, Rico got 37 out of 40 commands right. As the dog couldn't see anyone to get clues, the scientists believe Rico must understand the meanings of certain words.

    In another experiment, the scientists took one toy that Rico had never seen before and put it in a room with seven toys whose names the dog already knew. The owner then told Rico to fetch the object, using a word the dog had never heard before.

    The correct object was chosen in seven out of l0 tests, suggesting that the dog had worked out the answer by process of elimination(排除法). A month later, Rico remembered half of the new names, which is even more impressive.

    Rico is thought to be smarter than the average dog. For one thing, Rico is a border collie, a breed (品种)known for its mental abilities. In addition, the 9-year-old dog has been trained to fetch toys by their names since the age of nine months.

    It's hard to know if all dogs understand at least some of the words we say. Even if they do, they can't talk back. Still, it wouldn't hurt to sweet-talk your dog every now and then. You might just get a big, wet kiss in return!

A British woman who once weighed some 322 pounds said breaking a roller coaster seat during an amusement park outing was her motivation for working toward a healthier weight.

Four years ago, Danielle Wright, 27, went to the Alton Towers theme park in Staffordshire, England, with her sister. She wanted to avoid roller coasters, fearing that she was too heavy for them. But she was convinced to give it a try and boarded one of the rides.

"Fitting in the seat was bad enough, but when it came to pulling down the safety bar, my stomach stopped it from working," she recalled. "One of the employees came over and had to put his foot against the ride and push the bar hard to make it click into place."

She was worried throughout the ride that “the bar was going to pop open and I was going to be thrown off the tracks". When the ride ended, the bar sprang up and made a huge noise. Shortly after, she heard an announcement over the loudspeaker saying the ride was temporarily closed due to a broken seat.

Though it was embarrassing, the incident presented a silver lining. "It's what I needed to motivate me to lose pounds," Danielle said. She totally changed her diet, cutting back on carbohydrate and replacing food like chocolate with healthier choices such as apples and yogurt. Meanwhile, she also began participating in workout classes.

In November 2016, Danielle found out she was pregnant. But as tempted as she was, she didn't allow herself to eat unhealthy food while pregnant and stuck to her new diet.

Now Danielle weighs some 140 pounds. "Being able to run and play with my little boy is, he best part of it all. I couldn't have asked for a better reward," she said.