http://www.ted.com Why build a virtual world? Philip Rosedale talks about the virtual society he founded, Second Life, and its underpinnings in human creativity. It’s a place so different that anything could happen.

http://www.ted.com This 4-minute trailer gives you a taste of TED and the magic that happens at each TED Conference. Amazing speakers, powerful connections and unforgettable moments at this four-day “brain spa.” To find out more about attending an upcoming TED Conference, visit http://www.ted.com/index.php/pages/view/id/7

Once you’ve whetted your appetite, dive into our archive of almost 350 TEDTalks on TED.com and here on YouTube. TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world’s leading thinkers and doers are invited to give the talk of their lives in 18 minutes — including speakers such as Jill Bolte Taylor, Sir Ken Robinson, Hans Rosling, Al Gore and Arthur Benjamin. TED stands for Technology, Entertainment, Design, and TEDTalks cover these topics as well as science, business, politics and the arts. Watch the Top 10 TEDTalks on TED.com, at
http://www.ted.com/index.php/talks/top10

http://www.ted.com Science writer Richard Preston talks about some of the most enormous living beings on the planet, the giant trees of the US Pacific Northwest. Growing from a tiny seed, they support vast ecosystems — and are still, largely, a mystery.

http://www.ted.com Biochemist Gregory Petsko makes a convincing argument that, in the next 50 years, we’ll see an epidemic of neurological diseases, such as Alzheimer’s, as the world population ages. His solution: more research into the brain and its functions.

http://www/ted.com Andy Hobsbawm shares a fresh ad campaign about going green — and some of the fringe benefits.