8 / 07: The power of soccer

Johannesburg, South Africa (CNN) -- Sepp Blatter, the president of football's world governing body, lauded soccer's "power" to unite as the 2010 World Cup entered its final stages in South Africa this week.Now four former students from Harvard University have proved beyond doubt that a football can indeed be a powerful thing -- by creating a ball that can charge a mobile phone.Julia Silverman, one of the co-inventors, told CNN that the product dubbed the "Soccket" ball uses basic technology to create and store electricity. "We combined a ball with a simple charging device," she said. (CNN)