01/13/2012 02:58 pm ET | Updated Jan 16, 2012

TEDTalks 2011 Countdown (SLIDESHOW)

In this special year-end collaboration, TED and The Huffington Post counted down 18 great ideas of 2011, and featured the full TEDTalk with original blog posts that we think will shape 2012. Watch, engage and share these groundbreaking ideas in the order they were unveiled, including never-seen-before TEDTalk premieres.

Download the limited edition podcasts from iTunes here.

Best of TED Talks 2011