AIDS, transforming it overnight from a small group with a good idea to a powerful one with a lot of money to spend.

ECONOMIST: Sins of the secular missionaries | The

Social media went from an interesting idea to one of the most powerful tools in the toolbox.

FORBES: Why Media Planning Evolved into Connections Planning

Nonetheless, the idea that imaginary lines can have real victims is a powerful one.

NEWYORKER: Faces, Places, Spaces

Aimee was pursuing her master's degree in psychology, with a focus on eco-psychology -- the idea that harmonizing with nature can be a powerful tool in ensuring one's psychological health and vitality.

CNN: STORY HIGHLIGHTS

The idea that you could silence or activate neurons with light is a powerful one in combination with the tools that Boyden and Forest are working on together.

CNN: Top brain scientist is 'philosopher at heart'

The children know they're not actually teaching the dog, of course, but the for the kids, the idea that they know more than the dog and can share their knowledge is a powerful one.

CNN: Learning to read? Try talking to a dog