Visiting Congo for the first time without knowing the local language, Kiswahili, I was dependent on my talented interpreter Fidel for putting into words my countless questions and gratitude to the people I interviewed.

CNN: Your cell phone, Congo's misery

Even in a virtual world, communication is heavily dependent on two-way body language cues.

FORBES: Body Language in Second Life

The body language of business relationships is complex and context-dependent.

FORBES: The Other Side of the Mirror