"It's a grass-roots product that we developed out of frustration and necessity, " says Mr. McCausland.

WSJ: Out of Odor: Offensive-Smelling Bugs Put U.S. Farmers on the Defensive

The Dakaroise (residents of Dakar) consider physical fitness of great importance, and over the decades an exercise culture has developed deep roots in the city.

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It has its roots in the geopolitical situation that developed in the late 19th century.

CENTERFORSECURITYPOLICY: Center for Security Policy | The Measure of a Superpower: A Two Major Regional Contingency Military for the 21st Century | Page: 2

Solutions to America's challenges are being developed every day at the grass roots - and government should not be supplanting those efforts, it should be supporting those efforts.

WHITEHOUSE: Conference on Next Generation Leadership

The current law, known as The Farm Security and Rural Investment Act of 2002, traces its roots back to the system of price controls developed during Franklin Roosevelt's New Deal.

FORBES: Stock Focus: Betting The Farm

This week held some truly unexpected breakthroughs as scientists in China figured out a way to create brain cells from human urine, and researchers at Rice University and CUNY developed batteries that are fueled by the dye from madder roots.

ENGADGET: Inhabitat's Week in Green: madder root batteries, sun-powered plane and the world's first fiber-optic solar cell

The son of a diplomat, Salles grew up moving from country to country and developed an interest in filmmaking because he wanted to explore his roots and better understand his homeland.

CNN: Walter Salles: Back on the road

Obama's presidential campaign developed a reputation for harnessing technology and the Internet to mobilize its grass-roots movement.

CNN: Obama still must fill key positions, possibly with Republicans