TED is an incredible organization that brings some of the most intelligent and passionate people in the world together to give lectures and inspire the rest of us with their ideas.  They also have subtitles in many languages and an excellent interactive transcript tool for every video.  For a taste of the amazing minds who participate in TED lectures, watch neurologist Vilayanur Ramachandran talk about some very unusual things he has discovered while studying the brain, or watch Michael Pritchard explain his invention: a handheld device that can turn contaminated water into safe clean drinking water, something desperately needed by millions of people every single day.  There are hundreds of videos on this site, all with transcripts and each one showing a different genius at work.