What would it be like to walk on Mars? If you could build the highest building in the world，what would it look like? Do you dream of being the next J. K. Rowling? This summer, you can experience all of these things, and more. All you need is an Internet connection and your imagination.

    A recent study by the Kaiser Family Foundation found that kids spend an average of 1 hour and 29 minutes online each day. Many kids like to use that time to chat with friends, play games or check e­mails. But the next time you get on the Web, try exploring the world instead. “With the Internet，you can go back 11,000 years in time，or go 11,000 kilometers across the planet.” said Russell, Web search expert of Google. “The whole scope of history and the world is open to you.”

    There is a wealth of information to be found online. For example, if your family is going on vacation somewhere, do a quick online search on the area before you even get in the car. “What's the background of the place; what's the history？” says Russell. “I like to tell my kids, ‘Whenever you have a question, whenever you have a doubt, search it out.'”

    Ready to launch a virtual journey of your own? Here are a few starting points to get you thinking and to help you on your way. You can invite your parents along for the ride, too. Always ask for permission before downloading programs and software onto your computer. And check with a parent or an adult before visiting any new Web site.

    Navigate the world in 3­D with Google Earth. Begin in outer space and zoom (快速移动) into the streets of any city, from Hong Kong to San Francisco. Or visit ancient monuments, watch the changing rainforests over time, and dive underwater to explore tropical reef.

    With the Moon in Google Earth tool, you can walk in Neil Armstrong's famous footsteps. Take a guided tour of the moon's surface with Armstrong's fellow shuttle mate astronaut Buzz Aldrin.

    When you're exploring that part of the solar system, hop on over to the Red Planet with Google Mars. There, you can move very quickly around the surface and see images from the Mars Rovers.

    Not so long ago, most people didn't know who Shelly Ann Francis Pryce was going to become. She was just an average high school athlete. There was every indication that she was just another Jamaican teenager without much of a future. However, one person wants to change this. Stephen Francis observed then eighteen-year-old Shelly Ann as a track meet and was convinced that he had seen the beginning of true greatness. Her time were not exactly impressive, but even so, he seemed there was something trying to get out, something the other coaches had overlooked when they had assessed her and found her lacking. He decided to offer Shelly Ann a place in his very strict training seasons. Their cooperation quickly produced results, and a few year later at Jamaica's Olympic games in early 2008, Shelly Ann, who at that time only ranked number 70 in the world, beat Jamaica's unchallenged queen of the sprint(短跑).

    “Where did she come from?” asked an astonished sprinting world, before concluding that she must be one of those one-hit wonders that spring up from time to time, only to disappear again without signs. But Shelly Ann was to prove that she was anything but a one-hit wonder. At the Beijing Olympic she swept away any doubts about her ability to perform consistently by becoming the first Jamaican woman ever to win the 100 meters Olympic gold. She did it again one year on at the World Championship in Briton, becoming world champion with a time of 10.73—the fourth record ever.

    Shelly-Ann is a little woman with a big smile. She has a mental toughness that did not come about by chance. Her journey to becoming the fastest woman on earth has been anything but smooth and effortless. She grew up in one of Jamaica's toughest inner-city communities known as Waterhouse, where she lived in a one-room apartment, sleeping four in a bed with her mother and two brothers. Waterhouse, one of the poorest communities in Jamaica, is a really violent and overpopulated place. Several of Shelly-Ann's friends and family were caught up in the killings; one of her cousins was shot dead only a few streets away from where she lived. Sometimes her family didn't have enough to eat. She ran at the school championships barefooted because she couldn't afford shoes. Her mother Maxime, one of a family of fourteen, had been an athlete herself as a young girl but, like so many other girls in Waterhouse, had to stop after she had her first baby. Maxime's early entry into the adult world with its responsibilities gave her the determination to ensure that her kids would not end up in Waterhouse's roundabout of poverty. One of the first things Maxime used to do with Shelly-Ann was taking her to the track, and she was ready to sacrifice everything.

    It didn't take long for Shelly-Ann to realize that sports could be her way out of Waterhouse. On a summer evening in Beijing in 2008, all those long, hard hours of work and commitment finally bore fruit. The barefoot kid who just a few years previously had been living in poverty, surrounded by criminals and violence, had written a new chapter in the history of sports.

    But Shelly-Ann's victory was far greater than that. The night she won Olympic gold in Beijing, the routine murders in Waterhouse and the drug wars in the neighboring streets stopped. The dark cloud above one of the world's toughest criminal neighborhoods simply disappeared for a few days. “I have so much fire burning for my country,” Shelly said. She plans to start a foundation for homeless children and wants to build a community centre in Waterhouse. She hopes to inspire the Jamaicans to lay down their weapons. She intends to fight to make it a woman's as well as a man's world.

    As Muhammad Ali puts it, “Champions aren't made in gyms. Champions are made from something they have deep inside them. A desire, a dream, a vision.” One of the things Shelly-Ann can be proud of is her understanding of this truth.

    According to a British study presented to an international conference on smoking, within a few short years, more girls in Europe will be smokers than boys, for reasons experts still fail to understand.

    Anti-smoking activists (积极分子) at the second "Tobacco or Health" conference on the Canary Islands pointed out that while adults were giving up smoking in ever growing numbers, more and more young people were taking up the habit, especially girls.

    One 15-year-old in four is a regular smoker, according to a study made in 27 countries in Europe, the United States, Canada and Israel by Edinburgh University together with the World Health Organization.

    In Western Europe, girls were more likely than boys to smoke. In Germany and England, one third of the girls were smokers compared to one in four boys. In Eastern Europe, the girls "still fall behind" those in the Western Europe but were "catching up" quickly, said the study.

    The study dealt with the behaviour of 15-year-olds in seven European countries over a four-year period.

    The percentages of young women smoking went from 17 percent to 36 percent in Austria, from 17 percent to 28 percent in Norway, and from 21 percent to 28 percent in Hungary.

    Of the seven countries and regions studied (Austria, Finland, Hungary, Norway, Sweden, Switzerland and Wales), more girls than boys smoked in 1998, with the exception of Hungary.

    "Farm to table" is the name of a movement that encourages people to eat locally grown food. The farm-to-table idea has become more popular in recent years. But there is also a movement that brings "table to farm". Its purpose is to connect people to the land and to honor local farmers by creating a sort of restaurant without walls.

    Its founder, Jim Denevan, got the idea for this kind of "culinary adventure (美食探险)", as he called it, ten years ago. He recently prepared tables for more than a hundred people at Briars Farm in Virginia. He and his eight-member team arrived the night before. Chefs (厨师) from a local  restaurant prepared the dinner.

    Jim Denevan's brother is a farmer and he himself is a chef. He thought that the idea of a meal served right on the farm made sense, though not everyone agreed.

    "But I wanted to make the idea work, so I decided to cross the country, " said Denevan. "I went all the way across the United States and set the table on farms, ranches (大牧场) and beaches, and all the places where food came from. "

    "This kind of event connects us with a lot of enthusiastic people, people that we can form relationships with, " said Matt Szechenyi, who operates Briars Farm.

    The tour of the farm ends at the dinner table. The meats in the meal come from Matt Szechenyi's farm. The vegetables come from nearby farms. Guests and local farmers sit together.

    Annoica Ingram came with a friend. "The food is wonderful. I appreciate their hard work. I see everything they have to do to take care of the animals and make sure they are well-cared-for. Without them, I think, we'll have big problems, " she said.

Los Angeles is home to a popular cycling culture. The following bike shops will help you see the city in a whole new light. 

Los Angeles Bike Academy

Los Angeles Bike Academy is a bike shop with a critical mission: Provide resources and community for local underserved youth. Its initiative is its Earn-a-Bike program, where students spend time in the shop learning the basics of bike maintenance and running a store, and they graduate with their own bike. LABA also forms competitive cycling teams that race all around the country. 

The Cub House

It's a bike shop, a plant store and a nice place to wander through. It has something for everyone. Here you can play a game of ping-pong on the outdoor table, head into the mini greenhouse for a delicate plant, or just admire the vintage (老式的) cycling clothes hung on the walls. Finally, make sure to swing by the Cub House for the L. A. Invitational, a weekend party featuring multiple bike rides and a vintage car and bike show outside the store. 

Frank's

Some of the wildest bikes in L. A. are rolling out of Frank's. The house specialty here is BMX, specifically luxury models with large 29-inch wheels. These bikes are as much fun to look at as they are to ride. Since 1992, Frank's has found a business opportunity for itself as a destination for BMX builds and hard-to-find parts. The display counter has enough attractions to match a jewelry store. 

The Bicycle Stand

This spacious store features classic vintage bikes. It's worth making a trip to this store just to see their amazing collection. The store also specializes in vintage bike repainting and restorations. Besides, the Bicycle Stand team works on all kinds of rides, and the shop has a variety of refurbished (翻新的), ready-to-ride bikes for sale.