I was playing in my kitchen. My mom stood in front of me, hardly keeping the tears from spilling over. She told me that my little cousin had cancer. Hearing this, I went completely numb. How could this be happening? I had just seen her, and she was fine.

    These things didn't happen to our family, that's what my uncle said. It seemed like the world turned upside down; just last week my grandmother had passed away. I felt like I couldn't get my feet on solid ground.

    That's when my sister, Ella, came down the stairs with her long brown hair freshly washed. She sat next to me and smiled. Despite what was happening, everything would work out, her smile seemed to say.

    “Mom, do you think I could get my hair cut tomorrow?” Ella asked.

    “Sure,” Mom said, starting to wash the dishes.

    “I want to donate it to Locks of Love” Ella smiled.

    My mom stopped washing and turned to look at her. “Are you sure?” I noticed that Mom was holding back tears. This was a sacrifice(牺牲) for Ella. Her long hair was an important part of her.

    “Yeah, it's just hair. Eventually it will grow back.” She said.

    “All right,” Mom said quietly, smiling again.

    Ella gave up a part of herself for a while. She let a piece of herself go to someone else, someone she didn't know. That day she became my hero too.

    Would it surprise you to learn that, like animals, trees communicate with each other and pass on their wealth to the next generation?

    UBC Professor Simard explains how trees are much more complex than most of us ever imagined. Although Charles Darwin thought that trees are competing for survival of the fittest, Simard shows just how wrong he was. In fact, the opposite is true: trees survive through their co-operation and support, passing around necessary nutrition（营养）“depending on who needs it”.

    Nitrogen（氮）and carbon are shared through miles of underground fungi（真菌）networks, making sure that all trees in the forest ecological system give and receive just the right amount to keep them all healthy. This hidden system works in a very similar way to the networks of neurons（神经元）in our brains, and when one tree is destroyed, it affects all.

    Simard talks about “mother trees”, usually the largest and oldest plants on which all other trees depend. She explains how dying trees pass on the wealth to the next generation, transporting important minerals to young trees so they may continue to grow. When humans cut down “mother trees” with no awareness of these highly complex “tree societies” or the networks on which they feed, we are reducing the chances of survival for the entire forest.

    “We didn't take any notice of it” Simard says sadly. “Dying trees move nutrition into the young trees before dying, but we never give them chance.” If we could put across the message to the forestry industry, we could make a huge difference towards our environmental protection efforts for the future.

    A Chinese consortium（联盟）led by China Railway Corp will participate in bidding for a high-speed railroad linking Singapore and Malaysia in 2018, marking another step in China's ambitious strategy to export its high-speed railway technologies to Southeast Asia.

    The consortium, consisting of eight companies including CRRC, China Railway Construction Corporation Ltd, China Railway Signal and Communication Co and Export-Import Bank of China, covers the design, construction, telecommunication, financing, operating and maintenance（维护）sectors for the high-speed rail network.

    A joint tender（招标）for the Kuala Lumpur-Singapore high-speed rail project was issued by the Malaysian and Singaporean government-owned utilities（公用事业）—MyHSR Corp and SG HSR，on Dec 20.According to a joint statement released by the two companies, the potential bidder would be responsible for the design, construction, financing, operating and maintenance of rolling stock and railway systems for the double-track line with a designed speed of 350 kilometers per hour.

    The tender is open to all companies, regardless of their location. A tender briefing will be held in Kuala Lumpur on Jan 23, and proposals need to be submitted by June 29. Submissions will be evaluated based on technical merit（优点）, commercial robustness, financial sustainability and price. The preferred bidder will be selected by the end of next year. The governments of both countries signed a bilateral（双边的）agreement late in 2016 to begin the project. According to the agreement, the high-speed rail link is expected to become operational by Dec 31, 2026, and will cut travel time between Kuala Lumpur and Singapore to just 90 minutes.

    “The move indicates that China's State-owned enterprises have stopped cruel competition to hurt each other,” said Du Chunbu, a professor of rail transportation at Beijing Jiaotong University. “Instead, they have started to form a consortium to better compete with companies from Japan, South Korea, Germany and Canada by bringing their specialties into play.”

    We're surrounded by chemistry in everyday life. Sometimes it is easy to see, like when your science teacher conducts a big experiment in class. At other times, it can be extremely hard to see everyday chemistry at work, but nearly everything you touch or use has some element of chemistry in it.

    Something as simple as toothpaste contains at least three chemicals, if not more. It is the mixture of them and its chemical reaction that keeps your teeth clean. Other things you use every day are created by chemistry, such as hair products, shampoo and soap. Adding detergent (洗涤剂) to water involves chemistry. Without chemistry, we would never have realized that we need soap to get the oil out of clothes or skin.

    Chemistry not only helps us make products for use, but it also helps us understand the world around us. Chemistry helps us understand what the ozone layer (臭氧层) is and how it protects us. Chemistry also gives us sunscreen to protect us from the sun. Thanks to chemistry, we know bleach (漂白剂) can't be mixed with vinegar, because it can produce poisonous gas. Without chemistry, we wouldn't have had fireworks displays on important days like the Spring Festival.

    Chemistry plays a big role in food preparation. Cooking food causes it to go through a chemical change. That is why cooked food often tastes different from raw (生的) food. Baking is a great example of chemistry. Too much or too little of any ingredient makes a difference to the result of baking, for example, the dough (面团) won't rise or the cake will be flat.

    Chemistry isn't something that just lives in a lab; it's something that you come across hundreds of times every day. If you know how chemistry works, you will get a greater comprehension of the science behind some of the simplest looking things.

    We've all fantasized about it—after a rough day at work, stuck in traffic with commuters (上下班的人) we'd rather not have in our personal space, and bills to pay, plus the sound of the crying baby in the apartment next door. How nice would it be to go solo and live on an island of one, population: me?

    Well, this is the reality for 84 year old Elsie Eiler of Monowi, Nebraska. She is the sole resident of her hometown, which is the smallest recognized locality in the United States.

    Looking back at the 2000 census (人口普查), the town used to have another resident: Elsie's husband Rudy. Since he died in 2004, Elsie has lived in the town by herself. She considers herself to be the mayor, treasurer, and town librarian. Her main source of income is the bar that is frequented by truckers and other people passing through—the Monowi Tavern, which she founded with her late husband back in 1971 . She received a lot of public attention after it was discovered that she was the sole resident of Monowi, and in an interview she stated that many visitors from around the world have come to meet her in Monowi.

    When asked if she ever gets lonely, she said "I know I could always move closer to my children or stay with them whenever I want, but then I'd have to make all new friends again. Hopefully I will be able to stay here. It's where I want to be."

    A company has just launched(发起) what it calls "the world's first free standardized English test" recently. Anyone can take the test for free. The new exam is called the EFSET, which is short for Education First Standardized English Test. The company, Education First, is known by the letters EF.

    It is reported that there are two billion English language learners worldwide. Many of them are interested in attending an American college or university. To do so, foreign students need to take the Test of English as a Foreign Language—better known as TOEFL. However, many foreigners are not rich enough to take the TOEFL. In addition, test-takers often have to travel overnight to reach an official testing site. The World Bank says an average Cambodian worker earns only about $1,000 per year. The cost of taking the TOEFL is about 17.5 percent of the average worker's yearly wage.

    It is not just individuals who find the test pricey. Some governments also find it too expensive. What's more, not everyone needs official results from the TOEFL or IELTS—the International English Language Testing System. In the future, it's likely that the government may use the EFSET to test millions of employees and students.

    Experts believe that the EFSET meets the highest value in language testing. It uses special computer software that makes the questions easier or harder, depending on one's performance. The EFSET measures all the English learners' levels while the IELTS and TOEFL only measure learners' levels from intermediate(中等的) to advanced. The EFSET is unique in the sense that it gives free online access to anyone interested in measuring their English level.

    There is a 50-minute and a two-hour version of the test, which its developers are calling the EFSET Plus. Both versions test only reading and listening skills. It's hopeful that speaking and writing skills will be tested in the future. The IELTS and the TOEFL still use humans to rate the speaking and writing sections. It's a huge deal for students who are in areas where they can't get to the TOEFL or the IELTS. However, it is too early to know whether the EFSET results are acceptable for colleges and universities in America.