Imagine you are in a jumping contest. Animals and insects can also enter this contest. But they might just leave humans in the dust!

    The first event is the long jump. The human athlete is Mike Powell. In 1991, he jumped nearly 30 feet, which is the world record for the long jump. That is about five times his own height.

    His competitor in the long-jump contest is a frog named “Rosie the Ribbiter.” Rosie set the world record for frogs in 1986 by jumping more than 21 feet. Her record has never been broken by any other frog. Compared to Mike Powell, Rosie's jump is not that amazing. But wait! Rosie is only about 10 inches long when her legs are stretched to their full length. She can jump more than 25 times her size. Rosie, the frog, wins the long-jump event.

    The next event is the high jump. Javier Sotomayor, the world record holder, can jump a bar (横杆) 8 feet high. That is about as high as the ceiling in most homes.

    Looking around for someone to challenge his record, Javier might need a magnifying glass (放大镜). The next contestant is a tiny insect called the spittlebug (吹沫虫).

    The spittlebug can jump 28 inches into the air. It is only a quarter-inch long, less than the width of a pencil. If the spittlebug were the same size as Javier, it would be able to jump 600 feet into the air. That is like a human jumping over a building 55 stories high!

    Though the humans lose the “jumping contest,” their competitors would probably agree that Mike and Javier are still pretty excellent athletes. If only Rosie and the spittlebug could speak!

    French surgeons have performed what they said on Wednesday was the world's first partial face transplant— giving a new nose, chin and lips to a woman attacked by a dog.

    Specialists from two French hospitals carried out the operation on a 38-year-old woman on Sunday in the northern city of Amiens by taking the face from a brain-dead woman, who had hanged herself just hours before the operation. Her family agreed on the operation.

    “The patient is in an excellent state and the transplant looks normal,” the hospitals said in a brief statement after waiting three days to announce the pioneering surgery.

    The woman had been left without a nose and lips after the dog attacked her last May, and was unable to talk or chew properly. Such injuries are “extremely difficult, if not impossible” to repair using normal surgical techniques, the statement said.

    The statement did not say what the woman would look like when she had fully recovered, but medical experts said she was unlikely to resemble the woman who had been the source of her new face.

    The operation was led by Jean-Michel Dubernard, a specialist from a hospital in Lyon who has also carried out hand transplants.

    Skin transplants have long been used to treat burns and other injuries, but operations around the mouth and nose have been considered very difficult because of the area's high sensitivity to foreign tissue.

    Teams in France, the United States and Britain had been developing techniques to make face transplants a reality.

    There was a short-term risk for the patient if blood vessels became blocked, a medium-term danger of her body rejecting the new skin and a long-term possibility that the drugs used could cause cancers.

    Experts say that although such medical advances should be celebrated, the transplant had thrown up moral（道德的）and ethical(伦理的) issues. Little is known about the psychological effect of the transplant.

    Congratulations on having been offered, and accepting, a place to study at Cambridge! This page offers some tips that will hopefully make your arrival at Cambridge as stress-free as possible.

    Before you arrive

    Your College or Department will send you all the information you need to prepare yourself for your time in Cambridge, including College information, for example, accommodation, course information, and similar related details. You will be sent an email asking you to complete the University's Student Registration exercise. It will only take a few minutes.

    Pre-arrival Freshers' Events this summer

    Around the world in August and September, Cambridge Alumni（毕业生）Groups will be hosting pre-arrival Freshers' Events for new students coming to Cambridge this autumn. These events are a great opportunity to prepare for university and make some friends before you arrive. There will be the chance to meet current students and alumni from whom you can get tips and advice for living and studying in Cambridge.

    Arrival and registration

    Most courses start in October. The term between October and December is known as Michaelmas Term in Cambridge. Officially, the first day of the Michaelmas Term is 1 October and this date will be shown on your offer letter. Your College or your Department will advise you about when to arrive. Ceremony activities begin around 1 October for most students. When you arrive in Cambridge, you should go first to your College. They will be glad to know that you have arrived safely and will advise you on what to do next.

    Matriculation

    Matriculation marks the formal admission of a student to membership of the University, and a College may not normally allow an unmatriculatied student to be a resident member of the College. Every freshman for matriculation must agree with the following belief by signing the Matriculation Registration Form:

    I promise to observe the Statutes and Ordinances of the University as far as they concern me, and to pay due respect and obedience to the Chancellor and other officers of the University.

    Self-driving cars have been backed by the hope that they will save lives by getting involved in fewer crashes with fewer injuries and deaths than human-driven cars. But so far, most comparisons between human drivers and automated vehicles have been unfair. Crash statistics for human-driven cars arc gathered from all sorts of driving situations and all types of roads. However, most of the data on self-driving cars' safety have been recorded often in good weather and on highways, where the most important tasks are staying in the car's own lane and not getting too close to the vehicle-ahead. Automated cars are good at those tasks, but so are humans.

    It is true that self-driving cars don't get tired, angry, frustrated or drunk .But neither can they yet react to uncertain situations with the same skill or anticipation of an attentive Unban driver. Nor do they possess the foresight to avoid potential dangers. They largely drive from moment to moment, rather than think ahead to possible events literally down the road.

    To a self-driving car, a bus full of people might appear quite similar to an uninhabited field. Indeed, deciding what action to take in an emergency is difficult for humans, but drivers have sacrificed themselves for the greater good of others. An automated system's limited understanding of the world means it will almost never evaluate (评估)a Situation the same way a human would. And machines can't be programmed in advance to handle every imaginable set of events.

    Some people may argue that the promise of simply reducing the number of injuries and deaths is enough to support driverless cars. But experience from aviation(航空)shows that as new automated systems are introduced, there is often an increase in the rate of disasters.

    Therefore, comparisons between humans and automated vehicles have to be performed carefully. To fairly evaluate driverless cars on how well they fulfill their promise of improved safety, it's important to ensure the data being presented actually provide a true comparison. After all, choosing to replace humans with automation has more effects than simply a one-for-one exchange.

    Branksome Hall

    Class Size: 12 to 22

    Grades: JK to Gr. 12

    Gender(性别): All girls

    Living: day, Boarding(提供住宿的）

    Founded in 1903, Branksome Hall is Toronto's only all-girls, all-years International Baccalaureate (IB）World School. From the earliest grades, students learn to become leaders and to understand the value of serving the community. Discover Branksome hall's programs at www.brunksome.on.ca.

    Stanstead College

    Class Size: 13

    Grades: Gr. 7 to Gr.12

    Gender: Open to both sexes

    Living: Boarding

    Stanstead College is a private boarding school for boys and girls in Grades 7 through 12. It is an English school that embraces (包含) French in and out of the classroom. It is also uniquely placed to open doors to top universities and colleges in the United States, Canada and around the world.

    Oakwood Academy

    Class Size: 1 to 4

    Grades: JK to Gr. 12.

    Gender: Open to both sexes

    Living: Day

    Oakwood Academy is a private school for students who require an individualized education plan and small class size to meet their unique learning styles. Direct Instruction is used to teach academics in small groups and a meaningful curriculum (课程) allows students to truly learn.

    TEAM School

    Class Size: 8 to 12

    Grades: Gr. 1 to Gr.12

    Gender: Open to both sexes

    Living: Day

    TEAM School provides an academic program for students in Grades 1 through 12. Students from ages 6 to 14 benefit from small class sizes (8 students) and an individualized academic program to provide an educational upgrading.

D

With the completion of the Human Genome（基因组）Project more than 20 years ago, and the discovery of the double helix structure of DNA enjoying its 70th birthday last year, you might assume that we know how life works. Think again!

Evolution has a 4bn-year head start on us. However, several aspects of the standard picture of how life works-the idea of the genome as a blueprint, of genes as instructions for building an organism, of proteins as precisely tailored molecular（分子）machines and more-have wildly reduced the complexity of life. 

In the excellent book How Life Works, Philip Ball explorers the new biology, revealing life to be a far richer, more delicate affair than we have understood. Ball explains that life is a system of many levels-genes, proteins, cells, tissues, and body modules-each with its own rules and principles, so there is no unique place to look for an answer to it. 

Also, How Life Works is a much more appealing title than the overused question of "What is life?". We should be less concerned with what a thing is, and rather more focused on what a thing does. Defining a living thing implies an unchangeable ideal type, but this will run counter to the Darwinian principle that living things are four-dimensional, ever changing in time as well as space.

But it's an idea that is deeply rooted within our culture. Ball points out that we rely on metaphors（比喻）to explain and explore the complexities of life, but none suffice. We are taught that cells are machines, though no machine we have invented behaves like the simplest cell; that DNA is a code or a blueprint, though it is neither; that the brain is a computer, though no computer behaves like a brain at all.

Ball is a terrific writer, pumping out books on incredibly diverse subjects. There's a wealth of well-researched information in here, and some details that are a bit chewy for the lay reader. But the book serves as an essential introduction on our never-ending quest to understand life.