Pranav Mistry's work, demonstrated by Pattie Maes at TED in February, inspires profound philosophical, sociological and political questions. This group is for anyone who is excited by the work Mr. Mis...

TED Talks Virus hunter Nathan Wolfe is outwitting the next pandemic by staying two steps ahead: discovering new, deadly viruses where they first emerge -- passing from animals to humans among poor subsistence hunters in Africa -- before they claim millions of lives.

TED Talks Jacqueline Novogratz tells a moving story of  an encounter in a Nairobi slum with Jane, a former prostitute, whose dreams of escaping poverty, of becoming a doctor and of getting married were fulfilled in an unexpected way.

Browse more than 400 TEDTalks here -- great talks, demos and performances from the TED Conference and partners.