Virus hunter Nathan Wolfe is outwitting the next pandemic by staying two steps ahead: discovering deadly new viruses where they first emerge (passing from animals to humans among poor subsistence hunters in Africa) before they claim millions of lives.
In Mumbai, thousands of young girls are forced into the sex trade against their will after being kidnapped or sold by their families. This film documents the work of the Rescue Foundation, which searches out imprisoned girls, and provides a refuge for them after their escape.
Since 2001, all Indian primary schools have provided pupils with a free midday meal. Since then, truancy rates have been slashed and child health is soaring. Western governments are beginning to take note.
At age 14, in poverty and famine, a Malawian boy built a windmill to power his family's home. At age 22, William Kamkwamba spoke at TED for the second time, sharing in his own words the moving tale of invention that changed his life.