TED is a small nonprofit devoted to Ideas Worth Spreading. It started out (in 1984) as a conference bringing together people from three worlds: Technology, Entertainment, Design.
TED's lectures are free to watch. Some examples of the intellectual firepower arrayed on TED:
In Talks, Cary Mullis - the Nobel prize winner for groundbreaking DNA research talks about a radical and ingenious cure he has developed for bacterial infections. I enjoyed his book "Dancing Naked In The Mind Field".
In Theme " Medicine Without Borders", Dr. Seyi Oyesola - the inventor of the Hospital in a Box - tours a hospital in Nigeria and talks about why doctors move away and never come back.