Elephants in Uganda are starting to come close to villages near national parks. The big animals are a real danger to people.

    So, the Uganda Wildlife Authority has been giving people new tools to keep the elephants away: vuvuzelas. They are plastic instruments some fans use at sports events.

    The instruments make a loud sound elephants do not like. The animals leave, and no one is harmed. A spokesperson for the Uganda Wildlife Authority says vuvuzelas work because they do not threaten the elephants. That is important because an elephant that feels threatened is more likely to attack. So far, no one has reported an elephant attacking in answer to a vuvuzela.

    Officials and villagers have tried other ways to stop elephants from coming near farms and houses. They have built beehives – houses for flying insects that sting. They have hung ropes covered in spicy oil. They have dug long, deep holes. And they have used guns, called A-K47s.

    An official from the Uganda Wildlife Authority explains that people shoot the gun in the air to scare the elephant. But over time, the elephants have stopped being afraid of the sound of the gun. They only look at the shooter and wave their ears.

    Another official for the Uganda Wildlife Authority, Gessa Simblicious, says one elephant-prevention solution will not work everywhere in Uganda. And one day, elephants may accept the vuvuzela noise, just as they do the sound of the A-K47.

    But right now, vuvuzelas are an effective, non-violent and fun way to deal with a serious problem.

    Time wasters are real enemies of success. Time wasters could be people, events or habits that lead to the opposite path away from our goals. The most important starting point in removing the time wasters in life is to know about them. We need to sit down and analyze the activities which take our time.

    Start by making a list of our activities and sort out the neither urgent nor important ones. Sometimes it could be a simple addiction to a TV Soap Opera, constant distractions, or even one of our core （核心的）activities that we are not excellent at doing. We can, for instance, imagine that we are a business owner and we keep sabotaging our business deals, leading the company into great financial problems. It may be time for us to have our associates do the marketing while we concentrate on the areas we are best in. The next thing would be to make sure that we plan our daily activities. One of the obvious reasons is that we will have an upper hand in fighting against time wasters in our schedule. If what we want to do or what we don't want to do becomes clear, our focus is strengthened.

    Moreover, when we think of people we spend time with, we are sure to notice that some have a more positive impact on our success while others have a negative one. It is important to be able to distinguish them especially with regard to our schedule. While we do not advocate for everyone to throw away relationships, it is good to know that helping a friend who is emotionally disturbed can wait till dinner time. Finally, do the same to our habits. List all the habits and addictions that take any amount of our time. Then, take a little time to straighten them out in line with their importance and urgency.

    Depending on our analysis, kill those that are harmful to our goals in life.

The Power of Sound

The music of world-famous guitarist Gabriel Ayala can make you cheer or cry depending on the chords（弦）. As the winner of numerous musical honors, he said," I love the power of sound.

    He was also recently named Native American Music Awards Artist of the Year and he played at the inauguration（就职典礼）of President Barack Obama.

"My concerts are a journey for both my audiences and myself," he says. "Feelings and emotions are all over the board and I am the tool trying to convey those feelings, trying to paint a visual picture through chord changes. Sound conveys power, whether it's a well-performed craze or the wind blowing through the trees. Music isn't just a pretty melody also it's a visual performance that captures moments in life and puts them to music."

    Ayala also shares his gift with kids As a teacher with a master's degree he serves as an advocate（提倡者）for youth education by being a role model. He practices the philosophy of honoring elders, respecting women and loving children. He delivers a message lo youth that they can become whatever they dream of.

The music man has recently launched a non-profit foundation to work more closely with youngsters "I've been blessed in both my career and life and feel I need to give back to pay my respect and hanks for the gift I have owned and I can do that through music," he says.

    One of his experiences in giving back involved a high school class of some 200, which included a special needs group. I used my guitar as a tool to capture their interest and once I began playing, the whole behaviors of the class changed in a positive way. This was especially so for one of the disabled students whose hands would not allow him to even hold my costly guitar.

    When I put the valuable guitar in his lap and he started beating the heck out of it as hard as he could, there wasn't a dry eye in the house. That's the real reason I play music, not for fame or fortune but because music has the power to truly heal. The look on that boy's face was priceless.

    The setting was a packed gymnasium just before the start of a game against another school. There were five girls who were members of the Danville High School basketball team-all of them starters. They were not in uniform to play that night and would not be on the team for the rest of this season. They were there to admit their breaking of team rules. They were there to support their coach's decision to take them off the team. They were there to let the town know there was a problem in their little community that needed to be addressed. And they did it with sincere regret rather than defensiveness.

    While the school had been out for the New Year's holiday, the five girls had gone to the party with several of their friends. There was alcohol there. And they all drank some.

    Coach Rainville has a zero tolerance rule on drugs and alcohol for her members though it was a hard decision to make. When classes resumed and accounts of holiday parties were shared, rumors about the five girls began closing in on them. The coach said she couldn't back down on her rules. And the players-two junior students and senior students-agreed. That night in the gym was part of their public support of the coach's decision.

    “We hope you will understand that we are not bad kids. What we did was definitely not worth it. We hope this event will make everyone realize that there is a big drug and alcohol problem in our community,” one of the senior students said, “And if you work with us to try to solve this problem, you will help us feel that we have not been thrown off our basketball team for nothing.” The five left the floor to deafening applause.

    The team may not win another game this year. But they've learnt something about personal responsibility, the effect of one's action on others, and honesty that will serve them well throughout life.

    Most dog owners believe their dogs experience guilt, but animal behaviorists say the "guilty look" of a dog is simply a reaction to you and that dogs lack the ability to feel shame.

    Alexandra Horowitz, a psychology professor and principal investigator at the Horowitz Dog Cognition Lab at Columbia University once carried out a study on dog "guilt". She videotaped 14 dogs in a series of trials and observed how they reacted when their owners left the room after instructing them not to eat a treat. When the owner was gone, Horowitz gave some of the dogs the forbidden treat. Then she would tell the owners whether their dogs had eaten the treat or had behaved. However, Horowitz wasn't always honest with them.

    Horowitz found that the dogs' "guilty looks" had little to do with whether they'd eaten the treat or not. In fact, dogs that hadn't eaten it but were scolded by misinformed owners tended to exhibit the most elements of the "guilty look".

Horowitz says this shows that the dogs' body language is actually a response to their owner's behavior—not an experience of shame for a misdeed. Why then, do dogs look so ashamed when we scold them?

Maybe that look of guilt is the result of a learned association. When you scold your dog for chewing up a pair of slippers, he quickly learns that if he lowers his head and tucks his tail, the undesirable response—raised voice and angry expression—is more likely to disappear.

Inventor, physicist, surveyor, astronomer, biologist, artist... Robert Hooke was all these and more. Some say he was the greatest experimental scientist of the 17th century. In the course of his work, he cooperated with famous men of science like Isaac Newton, and the great architect, Christopher Wren.

Hooke's early education began at home, under the guidance of his father. He entered Westminster School at the age of 13, and from there went to Oxford, where he came in contact with some of the best scientists in England. Hooke impressed them with his skills at designing experiments and inventing instruments. In 1662, at the age of 28, he was named Curator of Experiments at the newly formed Royal Society of London — meaning that he was responsible for demonstrating new experiments at the society's weekly meeting. Hooke accepted the job, even though he knew that the society had no money to pay him!

Watching living things through a microscope was one of his favourite pastimes. He invented a compound microscope for this purpose. One day while observing a cork under a microscope, he saw honeycomb­like structures. There were cells — the smallest units of life. In fact, it was Hooke who invented the term "cell" as the box­like cells of the cork reminded him of the cells of a monastery．

Another achievement of Hooke's was his book Micrographia, which introduced the enormous potential of the microscope. It contains fascinating drawings of the thing he saw under the microscope. The book also includes, among other things, ideas on gravity, light and burning that may have helped scientists like Newton when they were developing their own theories on these phenomena.

Hooke made a valuable contribution to astronomy too. A crater on the moon is named after him in honour of his services to this branch of science.