The brilliant tropical sun seems to pause in its daily routine to warm the beaches of North Queensland, Australia. The turquoise water glistens, reflecting its light. A line of bodies lie in the soft sand, allowing the sun to bronze their skin. One sunbather turns over to face the warm rays. Some energetic young people play a rousing game of volleyball. An elderly couple read under a palm tree, glancing up occasionally to watch the volleyball players.

Fifteen years ago, scientists became spies.During the 1960s, the United States Navy literally "wired" the oceans in their search for Soviet submarines. Now, safe from the threats of the Cold War, the U.S. has allowed scientists to use these underwater microphones to uncover far different secrets.

Which disease causes 43,000 deaths per year worldwide, threatens 100 million at-risk people in twenty-one countries, and is considered the fourth leading cause of mortality in Latin America?