Not so long ago, a sailor sailing across the cold waters of the northern Pacific Ocean might have had every chance of being confronted by a sea cow. This cow would have measured 10 meters long, and weighed between five and ten tones. And it would spend most of its day cruising the seas, eating grass growing underwater. The cow in question was known as Steller's sea cow, which is now extinct.

    Today, many people are unaware that such an extraordinary creature once existed, or don't know its incredible story. But scientists have discovered many fundamental facts about this mystical animal.

    Surprisingly, the first recorded sighting of a Steller's sea cow didn't happen until 1741, when a sailing expedition was stuck on an uninhabited island, later named Bering Island. The sailor survived by hunting and eating the huge sea cow. Like its modern relatives, the sea cow lived in herds. That and its slow-moving behaviour made it easy to be caught.

    Those sailors that escaped Bering Island spread word of the bounty(大量) of meat to be found off its shores. As a result, more and more expeditions came to hunt the animals. One report stated that one sea cow could feed 33 men for a month.

    Incredibly, just 27 years after the island and species had been discovered by modern man, the last sea cow was reported killed. That makes the Steller's sea cow one of the few truly large mammals known to have been driven extinct in the modern age.

    With the rapid development of China's economy, more and more foreigners begin to learn Chinese because they are beginning to realize the importance and growing influence of China. Pupils in Warwickshire will soon be learning Mandarin after new links were forged(建立联系) with a region in China.

    Head teachers from the county spent a week in Shenzhen in South-east China, making links with schools and touring different education establishments.

    Schools that took part are now looking to introduce Mandarin lessons. Pupils from schools in Warwickshire and Shenzhen are starting to write and e-mail each other and plans are being made to share lessons over the Internet.

The trip was arranged by Warwickshire County Council and funded by the British Council as the first stage of development of a range of ties with the economically booming city.

    International development officer Judith Young said: “We are entering an exciting period of school relation between Warwickshire and Shenzhen. There is a real appetite for sharing ideas among the Chinese. We were able to see the differences and similarities between the education systems and there are many areas in which our schools, teachers and pupils will be able to benefit from a different cultural perspective(观点) and links with a country that is becoming very important on the world stage.

    Throughout the high profile(引人注目) visit led by our county education officer, Eric Wood, our group was made to feel very welcome and attracted a great deal of interest. Our visit to a primary school was featured as the main news item on television that night. A mark of how highly the visit was valued is that plans are being made for a return visit to Warwickshire of civic leaders, senior education officials and school principals.”

    The first ancient Olympic Games for which we still have written records were held in 776 BC. Coroebus won the only event at the Olympics. This made him the very first Olympic champion in history. Then they grew and continued to be played every four years. In 393 AD, the Roman emperor Theodosius Ⅰ, a Christian, announced to end the Games because of their pagan (异教的) influences.

    About 1,500 years later, a young Frenchman named Pierre de Coubertin began their revival (恢复). In 1892 Coubertin first brought forward his idea to revive the Olympic Games but failed.

    Two years later, Coubertin organized a meeting with 79 delegates (代表) who represented nine countries. At this meeting he got what he wanted. All the delegates at the conference voted for the Olympic Games. They also decided to have Coubertin set up an international committee to organize the Games. This committee became the International Olympic Committee (IOC) and Demetrious Vikelas from Greece was selected to be its first president. Athens was chosen for the revival of the Olympic Games and the planning was begun.

    The very first modern Olympic Games opened in the first week of April, 1896. Since the Greek government had been unable to afford a stadium, a rich Greek architect, Georgios Averoff, donated one million drachmas (over $100,000) to repair the Panathenaic Stadium, originally built in 330 BC.

    Since the Games were not well publicized internationally, contestants (选手) were not nationally chosen but rather came individually and at their own expense. Some contestants were tourists who happened to be in the area during the Games.

    The year 2018 will mark the 100th anniversary of the deadliest influenza outbreak in history. It is estimated that the influenza pandemic(瘟疫) of 1918 killed more than 50 million people around the world. Other estimates go much higher. Because of a lack of medical record—keeping, we may never know the exact number.

    The influenza was a fast killer. Some victims died within hours of their first symptoms. Others died after a few days. “Their lungs filled with liquid and they choked to death. ”The 1918 flu pandemic was also different from other outbreaks. It struck many young, healthy people. Viruses usually affect sick or old people.

    Although modem medicine effectively controls many diseases, influenza remains difficult to protect against, The World Health Organization estimates that every year influenza kills 250, 000 to 500, 000 people around the world. Each year, medical scientists develop flu vaccines(疫苗) which offer immunity(免疫)from some influenza viruses. But they can only guess which form of the virus will spread.

    Health officials remain concerned about another flu pandemic. New forms of the flu virus appear regularly. One example was the “swine flu”or H1N1outbreak in 2009. Anthony Fauci, Director of the National Institute of Infectious diseases in the United States says that virus caused a true pandemic.

    To stop the next pandemic, scientists are now researching how to create a universal influenza vaccine. In October 2017, Vanderbilt University Medical Center in the U. S. announced the Universal Influenza Vaccine Initiative. The university said researchers are leading an international effort to develop a universal influenza vaccine that will protect everyone against all forms of the flu anywhere in the world. The university added that researchers will begin tests in early 2018, the Human Vaccines Project, a public—private partnership, is funding the project. However, until a universal influenza vaccine is available, today's seasonal flu vaccine remains important.

    Whether you prefer burning the midnight oil or going to bed early so you can get up at the break of dawn depends on your genes, according to experts.

    I jump out of bed each morning, eager to start an active day. But I can hear my neighbor's alarm clock ringing non-stop every morning and I doubt he gets to work on time.

    A lot of noise comes from his flat in the evening. He's happy to stay up watching TV till after midnight, while I go to bed early and try to sleep.

    Well, it might not be his fault after all. I'm called“a lark (百灵鸟)”and my neighbor“an owl (猫头鹰)”

    We all have inside “clocks”in the brain to control all kinds of bodily functions and it is reset every day by light. These inside clocks run to a different schedule in “larks” and “owls”. If you have a fast clock, you like to do things early, and if you have a slow clock, you like to do things late.

    Because we live in a 24/7 world, scientists believe it's important to understand a person's “chronotype?—the time of the day when they function the best. It could help us lead a healthier life.

    A US professor has studied sleeping patterns and thinks work times should be changed and made more individual to fit in with our chronotypes.

    And he has advice for those who can't choose their working hours:“If that's not possible, we should be more careful about light exposure,” says the professor. “You should try to go to work not in a covered vehicle but on a bike. The minute the sun sets we should use things that have no blue light, like computer, screens and other electronic devices.”

    It seems that electronic devices just keep getting smaller. Scientists in the United States have announced the creation of the first transistor with only two dimensions(二维).

    A transistor is a small electronic device that transfers or carries electronic current. Scientists hope these new 2D transistors will be used for building high-resolution(高分辨率)displays that need very little energy.

    Two groups of scientists created these 2D transistors. They report that the transistors are only a few atoms thick.

    Usually transistors are made with the element silicon(硅). Computer processors, memory chips, TV screens and other electronic devices contain billions of silicon-based transistors. But these very small electrical parts have certain limitations.

    Dimitris Ioannou is an electrical engineering professor at George Mason University. He says the traditional transistor has been improved as much as it can be. He adds that researchers have been looking for new materials with special features and they want transistors to be seen through and soft.

    "If the layers are very thin, the transistor can become flexible, so it doesn't have to be rigid(坚硬的), like it would be in a silicon chip. So people can think of applications like wearable electronics, television screens and other things," said Ioannou.

    These new transistors can also carry higher current. They also can move the current much faster than traditional transistors. This is important for high-definition screens.

    Dimitris Ioannou says the scientific success could prove very useful in the future. "Now, how good and how useful it will be, it's still in the stage of research, but it certainly is an advance," said Ioannou.