Probably no other musical instrument is as popular as the guitar around the world. Musicians use the guitar for almost all kinds of music. Country and western music would not be the same without a guitar. The traditional Spanish folk music called Flamenco could not exist without a guitar. The sound of American blues music would not be the same without the sad cry of the guitar. And rock and roll music would almost be impossible without this instrument.

    Music experts do not agree about where the guitar was first played. Most agree it is ancient. Some experts say an instrument very much like a guitar was played in Egypt more than 1,000 years ago. Most experts say that the ancestor of the modern guitar was brought to Spain from Persia sometime in the 12^th century. The guitar continued to develop in Spain. In the 1700s it became similar to the instrument we know today.

    Many famous musicians played the instrument. The famous Italian violins Niccole Paganism played and wrote music for the guitar in the early 1800s. Franz Schubert used the guitar to write some of his famous works. In modern times Spanish guitarist Andres Segovia helped make the instrument extremely popular.

    In the 1930s, Les Paul began experimenting to make an electric guitar. He invented the solid-bodied electric guitar in 1946. The Gibson Guitar Company began producing its famous Les Paul Guitar in 1952. It became a powerful influence on popular music. The instrument has the same shape and the same six strings (弦) as the traditional guitar, but it sounds very different. Les Paul produced a series of extremely popular recordings that introduced the public to this music. Listen to this Les Paul recording. It was the fifth most popular song in the United States in 1952. It is called “Meet Mister Callaghan.”

    Zebra crossings－the alternating dark and light stripes on the road surface－are meant to remind drivers that pedestrians may be trying to get across. Unfortunately, they are not very effective. A 1998 study done by the Department of Traffic Planning and Engineering at Sweden's Lund University revealed that three out of four drivers maintained the same speed or even speeded up as they were approaching a crossing. Even worse, only 5% stopped even when they saw someone trying to get across.

    Now a mother-daughter team in Ahmedabad, India has come up with a clever way to get drivers to pay more attention－a 3-D zebra crossing with an optical illusion (视错觉).

    Artists Saumya Pandya Thakkar and Shakuntala Pandya were asked to paint the crosswalks by IL&FS, an Indian company that manages the highways in Ahmedabad. The corporation was looking for a creative solution to help the city's residents to cross the busy accident-prone  (易出事故的) roads safely. Thakkar and Pandya, who had previously seen images of 3-D zebra crossings that gave drivers the illusion of logs(原木)of wood on the streets in Taizhou, China, decided to test if a similar way would work in India.

    Sure enough, in the six months that the 3-D crosswalks have been painted across four of the city's most dangerous highways, there have been no accidents reported! The artists say that while it may appear that the zebra crossing could cause the drivers to brake suddenly and endanger the vehicles behind, such is not the case. Because of the way the human eye works, the illusion is only visible from a distance. As they get closer, the painting looks just like any other ordinary zebra crossing. The creators hope that their smart design will become increasingly common throughout India and perhaps even the world. So let's look forward to it.

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    Look and listen, and that concert poster just might be singing. Engineers have designed antennas（天线）that can turn everyday objects, from posters to clothing, into radio stations. Anyone walking or driving by can tune in and hear what's on. The devices use radio waves, but they don't generate their own. They hijack（劫持）the same waves that carry music and news to your smartphone.

    Vikram Iyer co-led the project with Anran Wang, a graduate student in computer science and engineering. The two got the idea for their invention by paying attention to what was already around them. “It's the ideal way to minimize the power consumption for any kind of communication,” notes Iyer. Their research had focused on new types of wireless communications that won't require much energy. They wanted something that would work outdoors in a city. Then they realized the air is already filled with wireless communications in the form of radio stations.

    Radio waves carry energy at the speed of light from tall transmission towers to radios in cars, phones and homes. These waves of the antennas take in existing radio waves and change them slightly. Those changes add new sound information. The changed waves are then sent back out into the world where people can listen in. So the device only needs enough power to change the waves, not to generate them.

    The scientists tested their device with a poster. It advertised a Seattle concert by Simply Three. People standing almost 4 meters away from the poster could use FM receivers on smartphones to listen to all songs of the band's music. Those in cars as far as 18 meters away could use car radios to pick up some parts of the songs

    The technology could even extend to clothes. Iyer, Wang and their team turned the shirt into an antenna. It let the shirt talk to the wearer's smartphone. If a sensor in the shirt tracked a person's heart rate during exercise, for instance, the antenna could transmit those data to the wearer's phone.

    18-year-old Kayla Perkins explains what is in her bedroom, "I throw something on the floor and I know right where it is." However, her parents, Steve and Deborah Perkins, of McKinney, Texas, haven't caught on. Even Kayla admits that, at the worst, her room is a mess.

    Most families at some point have at least one child whose room looks like a landfill(垃圾堆). The mess can disturb the whole household. Dirty clothes pile up; dirty dishes get lost in the mess and smell bad; homework is lost; and valuable things are ruined.

    Some parents let it go, believing that a bedroom is private space for children to manage as they wish. Others lecture their children, offer rewards for cleaning, or punish them when they don't. What doesn't work, parenting experts say, is constant lectures, verbal(口头的,言语的) threats or getting very angry. Mrs. Perkins says they picked up all the clothes on Kayla's floor and hid them. They cleaned everything up. When Kayla came back to a bare bedroom, there was screaming and shouting, "How can I live without my clothes?" Mrs. Perkins asked Kayla to earn her clothes back by doing housework. These days, she keeps her room clean.

    Humour can help, too. For example, since Jessica, the 14-year-old daughter wasn't bothered by the dirty clothes all over her floor, the whole family started using her room as a place to store dirty clothes. Her attitude changed after her family did that. By the time she gave in and cleaned up her room a few days later, even she was laughing.

Parenting expert, Jim Fay, also recommends that parents first ask children in a nice way to clean up and agree on a reasonable time limit. Children often behave better if you treat them in the way you would want to be treated by your boss at work—with respect and high expectations.

April 3 -- A 7.3-magnitude earthquake shook the sea area near Hualien of China's Taiwan at 7:58 am Wednesday (Beijing Time), followed by multiple aftershocks, according to the China Earthquake Networks Center (CENC).

At least 26 buildings collapsed in the earthquake Wednesday, 15 of {#blank#}1{#/blank#} are in Hualien County. More than 91,000 households are without electricity,

The quake caused tsunami(海啸) warnings in Taiwan, southern Japan and the Philippines, with waves less than half a meter observed along some coasts, and caused airlines {#blank#}2{#/blank#}(suspend ) flights.

Taiwan is {#blank#}3{#/blank#}(regular) rocked by earthquakes due to its location on the Pacific Ring of Fire, which runs around the edge of the Pacific Ocean and {#blank#}4{#/blank#}(cause) massive volcanic activity from Indonesia to Chile.

Wednesday's quake is the {#blank#}5{#/blank#}(strong) to hit Taiwan since 1999. That {#blank#}6{#/blank#}(power) 7.7 magnitude quake hit 150 kilometers south of Taipei, killing 2,400 people {#blank#}7{#/blank#} injuring 10,000 others.

The Chinese mainland's Taiwan Affairs Office on Wednesday expressed concern and offered {#blank#}8{#/blank#}(assist) to Taiwan following the earthquake. Zhu Fenglian, spokesperson for the office, stated the mainland's deep concern for the situation and extended heartfelt condolences(慰唁) to those {#blank#}9{#/blank#}(affect) in Taiwan. She emphasized the mainland is close monitoring of developments and is willing to provide support {#blank#}10{#/blank#} disaster relief efforts.

Kelli Boehle says her son Nik was an amazing and caring person. Nik was diagnosed(诊断) with cancer in 2008 when he was 17. He passed away in 2012. But Nik's kindness and generosity have lived on long after his death.

After he was diagnosed and started treatment, Nik was granted (给予) a wish experience from the Make-A-Wish Foundation. "For just this period of time, we didn't think about cancer, "Kelli Boehle said. "All we thought about was enjoying our time together."

In 2009, Nik met another young man Nate, who was also going through cancer treatment. He'd been diagnosed a month after turning 18, and Nik learned he was too old to qualify for a wish. The night before Nik passed away, he asked his mother to help ensure that young adults fighting cancer could have their wishes come true too. 

"It was like a seed he planted that just wouldn't stop coming into my mind, " she said. In 2012, Kelli Boehle started Nik's Wish. The nonprofit grants wishes to young adults between the ages of 18 and 24 who are battling cancer. Nate was the organization's first wish recipient. "It's meant to bring them joy and know that they're loved and that we're fighting for them, too, "Kelli Boehle said. 

Recently, 19-year-old Jordan Morrow received her wish to attend a Taylor Swift concert as part of a trip to Los Angeles. For Morrow, who has spent the last year battling brain cancer, going to the concert has done more than lift her spirits. "I think it's something to get me through whatever comes my way, "she said. "And I'm thankful for Nik's Wish for that. "

In the 11 years since Nik passed away, the organization has granted more than 300 wishes across more than 30 states. In the beginning, Kelli Boehle says she wasn't sure she could be a wish maker and work closely with the young adults. But now, it's her favorite thing to do.