Back in 2003 an 86-year-old man drove his Buick through a crowded farmers' market. Nine people were killed. More than fifty-four people were hurt, fourteen with serious injuries. When he finally stopped, the 86-year-old man got out his car and screamed at people to get out of the way. No alcohol or drugs were found in his system. Apparently, he was just old and confused.

    This is a frightening accident, and it is not a rare one. There are many examples of elderly drivers driving into swimming pools, houses, storefronts, or worse.

    In our teenage years, we all heard “driving is not a right; it's a privilege.” That is still true, and there comes an age when driving is no longer a privilege that can be allowed. After a certain age, eyesight and dementia(痴呆) are very serious concerns. Undoubtedly, these age-related problems affect some older adults' driving ability. By the time a person is between eighty-five and ninety years old, his or her driving privilege should be examined.

    Licensing laws vary greatly from state to state, and it's time for a national law on the maximum age limit for driving. The motivation for this law is safety. Another option is to start with laws that ban anyone over the age of eighty-five from driving after sundown, because driving conditions are not as safe as daylight hours. Still another option that may allow elderly drivers to continue driving could be new technology like a voice warning system that cautions drivers on busy streets or at traffic lights. Finally, since there are laws against driving under the influence of alcohol and drugs, shouldn't some prescription drugs also be included? The average age of 85-year-old is undoubtedly taking at least one prescription drug daily.

    The thought of an 86-year-old driver with failing eyesight running down the road in a two-ton piece of metal is unsettling to us all. Driving at an advanced age is not only challenging for the elderly drivers, but also it's dangerous for the rest of us.

    If you watch British television on Friday March 15,you might be surprised to see celebrities wearing funny red noses and joking around. But don't worry. They're not mad. It's all part of a biannual fund-raising event called Red Nose Day.

    Organized by the charity Comic Relief, founded in 1985 by two British comedians, the aim of the event it is to raise money to fight poverty and injustice in the UK and Africa. Celebrities and public figures support the event by making appearances on comic TV shows broadcast by the BBC. This year, for example, UK Prime Minister David Cameron appeared in a music video by One Direction, which the band produced for the event.

    But Britons don't just raise money for charitable causes on one day a year. They do it all year round. One way of doing so is-by shopping in charity shops. These small, inconspicuous shops sell clothes, books and household goods just like any other shop But there's one big difference—everthing sold in the shops is second-hand.

    There are nearly 10,000 charity shops in the UK, according to the Charity Retail Association. Their business model is simple: Anybody who has things they don't want anymore can donate them to a charity shop, where they are checked for damage, cleaned and priced. Most items go back on sale at a small part of their original price and the money that is made by selling them is used for a charitable cause.

    The idea of buying used clothes may sound off-putting, but for shoppers who have less spending money, such as the elderly or those in low-paying jobs, it has been a welcome option for years. Now, shopping at charity shops is also becoming popular with young people looking for alternative fashion." You can find very unique clothes for a very cheap price. It doesn't bother me that other people may have worn them. I simply wash them before I wear them," said Anne Marie, a 19-year-old Internet user from the US, in a comment on a Yahoo forum.

    So next time you spot a charity shop, why not go inside? Who knows, you might find a lovely dress for just a few pounds. Even better, you can enjoy wearing it in the knowledge that your money helped a good cause.

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    Were dinosaurs (恐龙) warm-blooded or cold-blooded? According to a new study, scientists have found that they were somewhere in the middle. This new study shows that dinosaurs were very different from most of today's animals that are either warm or cold-blooded.

    “I think we were all surprised by this,” said Felisa Smith from the University of New Mexico. “The idea certainly took some getting used to.”

    A study by a team of scientists led by John M. Grady of the university studied many different kinds of dinosaurs in their research. They looked at growth rate (比率), body temperature and body size of different kinds of dinosaurs.

    How are warm-blooded animals different from cold-blooded animals? Warm-blooded animals like humans can control their body temperature. They eat a lot, and burn calories (卡路里) quickly. They have a more active lifestyle than cold-blooded animals. While cold-blooded animals such as snakes do not control their body temperature. Instead, they must use sunlight to keep warm, and they move much more slowly. Cold-blooded animals do not need to eat very much. Their bodies slow down in colder temperatures.

    Besides dinosaurs, there are other animals that are not completely warm-blooded or cold-blooded, such as great white sharks.

    Reading makes you a smarter, better leader. But if you've been following the latest science, you'll also know that studies have shown regularly picking up a book might increase your empathy (共鸣) and protect you from feeling lonely, hopeless or suffering from dementia (痴呆) in later life. But obviously, that's not the end of the list. New research has discovered yet another benefit of being a reader who focuses one's mind on reading.

    After following those surveyed based on more than 3,500 adults over age 50 for 12 years, the team from Yale University behind the research found that those who read books for 3.5 hours a week were 23 percent less likely to die. Reading for less than 3.5 hours a week lowered participants' (参加者) risk of death by 17 percent. Put another way, picking up an interesting book could earn you about an extra two years.

    It's worth noticing that the researchers were looking exactly at time spent in reading books, rather than newspapers, magazines, or online media, and that this difference is important for the observed advantages of reading. “We found that reading books provided a greater advantage than reading newspapers or magazines,” said Avni Bavishi of the Yale School of Public Health. “This effect is likely because books attract the readers' mind more — providing more cognitive (认知的) advantages, and therefore increasing the lifespan (寿命). In short, deep slow reading rather than reading quickly and carelessly is best.”

    So how long should you be reading for, and what sort of titles should you pick up? While more reading seems to be better, the researchers suggest that anything more than

    30 minutes a day will be likely to do good to you. As for what exactly to read, the researchers can't yet offer much advice beyond making time for actual books, though they pointed out this was a promising way to future research.

    Animals, including insects, do not have a language like ours. They do not talk to each other in words and sentences. But if we watch them, we can see that they do have ways of communicating with each other.

    Can you see the rabbits' tail? When rabbits see this white tail moving up and down, they run too. The rabbit has reminded them of potential dangers without making a sound. It has given them a signal.

    Many other animals use this kind of language. When a cobra(眼镜蛇) is angry, it raises its hood(兜帽) and makes itself look fierce. This warns other animals. When a bee has found some food, it goes back to its home. It cannot tell the other bees where the food is by speaking to them, but it does a little dance in the air. This tells the bees where the food is.

    Some animals say things by making sound. A dog barks, for example, when a stranger comes near. A cat purrs(猫的呜呜声) when pleased. Some birds make several different sounds, each with its own meaning. Sometimes we human beings speak in the same way. We make sounds like “Oh” or “Ah!” when we are frightened or pleased or when we drop something on our toes.

    But we have something that no animals have a large number of words which have the meanings of things, actions, feelings or ideas. We are able to give each other all kinds of different information in words and sentences, which no other animals can do. No other animals have so wonderful a language as we have.

    When he was young, Louis Armstrong was taking what was called “Creole jazz”, which was also called dance music, and combining it with trumpeter (小号手) Buddy Bolden, to create what would eventually become today's jazz.

    Armstrong accomplished that with almost no formal training. He received little training before he was placed in the New Orleans Colored Waif's Home at the age of 12, after a run-in (小争执) with the police. The punishment turned out to be a mixed blessing, for he also had the opportunity to play in a real band.

    While at the Waif's, Armstrong also got the chance to hear some of the city's finest musicians. Cornetist Freddie Keppard performed in a nearby club. So did trumpeter and bandleader, King Joe Oliver, who took the boy under his wing and taught him how to read music and work on his playing technique.

    When Oliver left for Chicago, Armstrong chose to stay in New Orleans and work with some of the other top musicians of the day. In Chicago, King Oliver offered him a place in his band in 1922. It became Armstrong's biggest challenge yet — the band had no parts written for trumpet, so he was forced to listen to King Oliver and improvise (即兴创作).

    Soon, Armstrong's undeniable talent was getting notice. Even classically trained musicians would come to hear the incredible sounds this young man created.

    Lil Hardin, the bands piano player and the future Mrs. Armstrong, explains that Oliver kept Armstrong in the second trumpet-chair so that Oliver would still be “King”. Hardin convinced him to leave the band.

    Armstrong moved to New York City in 1924 to join Fletcher Henderson's band and then flew solo. In 1925, Armstrong put together the Hot Five, expanding his popularity even more. Armstrong recorded his first composition, Cornet Chop Suey, one of the most copied jazz solos of all time. This monumental 1928 recording blends (混合) artistry, endurance and showmanship that has rarely, if ever, been matched in Jazz.