"Ideas worth spreading."

That's how nonprofit TED (an acronym for technology, entertainment, and design) describes its mission. The organization is celebrated for its semiannual conferences that bring together some of the world's best movers, shakers and thinkers. The TED challenge? Give the talk of your life -- in 18 minutes or less -- to a room full of gifted minds.

Most of us don't have the opportunity to attend conferences around the globe and witness the TEDTalks first hand. Thankfully, the organization uploads its presentations online, where users can stream them for free.

A recent post on the TED Blog announced a list of the TEDTalks that have attracted the most views since the organization began posting videos online six years ago. These informative and addictive presentations include Steve Jobs' famed commencement address at Stanford University in 2005, a researcher's chilling observation of her own brain during a stroke, and many more.

Click through our gallery (below) to view the 13 most popular TEDTalks, and tell us in the comments which video is your favorite. Then check out the slideshow of our 15 favorite TEDTalks you definitely should not miss.

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  • #13 - Elizabeth Gilbert: Your Elusive Creative Genius

    The author of "Eat, Pray, Love" discusses how we all have a little genius in us. Total views: 4,538,037 Year released: 2009 <a href="http://blog.ted.com/2012/08/21/the-20-most-watched-ted-talks-to-date/" target="_hplink">Source: TED Blog</a>

  • #12 - Arthur Benjamin Does "Mathemagic"

    Learn how mathemagician Arthur Benjamin can race calculators and solve difficult mental math equations. Total Views: 4,658,425 Year released: 2005 <a href="http://blog.ted.com/2012/08/21/the-20-most-watched-ted-talks-to-date/" target="_hplink">Source: TED Blog</a>

  • #11 - Dan Pink: The Surprising Science Of Motivation

    Unmotivated? Career analyst Dan Pink let's you in on a few secrets to increase your drive. Total views: 4,706,241 Year released: 2009 <a href="http://blog.ted.com/2012/08/21/the-20-most-watched-ted-talks-to-date/" target="_hplink">Source: TED Blog</a>

  • #10 - Brené Brown: The Power Of Vulnerability

    Understand more about the human connection after listening to University of Houston professor Brené Brown's lecture on emotion. Total views: 4,763,038 Year released: 2010 <a href="http://blog.ted.com/2012/08/21/the-20-most-watched-ted-talks-to-date/" target="_hplink">Source: TED Blog</a>

  • #9 - Hans Rosling: Stats That Reshape Your World-View

    Watch as professor and statistics wiz Hans Rosling changes your thoughts about the developing world. Total views: 4,966,643 Year released: 2006 <a href="http://blog.ted.com/2012/08/21/the-20-most-watched-ted-talks-to-date/" target="_hplink">Source: TED Blog</a>

  • #8 - Steve Jobs: How To Live Before You Die

    Six years prior to his death, former Apple CEO Steve Jobs delivered an almost haunting lecture on how to live life to the fullest. Total views: 5,444,022 Year released: 2005 <a href="http://blog.ted.com/2012/08/21/the-20-most-watched-ted-talks-to-date/" target="_hplink">Source: TED Blog</a>

  • #7 - Simon Sinek: How Great Leaders Inspire Action

    Simon Sinek, author of the book "Start With Why," explains his model for effective leadership. Total views: 6,050,294 Year released: 2010 <a href="http://blog.ted.com/2012/08/21/the-20-most-watched-ted-talks-to-date/" target="_hplink">Source: TED Blog</a>

  • #6 - Tony Robbins: Why We Do What We Do

    Life coach Tony Robbins not only high-fives Al Gore in this video, but also explains what motivates certain actions within an individual. Total views: 6,879,488 Year released: 2006 <a href="http://blog.ted.com/2012/08/21/the-20-most-watched-ted-talks-to-date/" target="_hplink">Source: TED Blog</a>

  • #5 - Pattie Maes And Pranav Mistry Demo SixthSense

    Check out this awesome interactive tool, invented by Pranav Mistry from Pattie Maes' lab based at MIT. Total views: 7,467,580 Year released: 2009 <a href="http://blog.ted.com/2012/08/21/the-20-most-watched-ted-talks-to-date/" target="_hplink">Source: TED Blog</a>

  • #4 - David Gallo: Underwater Astonishments

    Explore the mysterious ocean floor as David Gallo shows you creatures you've probably never laid eyes on. Total views: 7,879,541 Year released: 2007 <a href="http://blog.ted.com/2012/08/21/the-20-most-watched-ted-talks-to-date/" target="_hplink">Source: TED Blog</a>

  • #3 - Pranav Mistry: The Thrilling Potential Of SixthSense Technology

    Along the same lines as video number five, Pranav Mistry further explains the possibilities behind his SixthSense device. Total views: 9,223,263 Year released: 2009 <a href="http://blog.ted.com/2012/08/21/the-20-most-watched-ted-talks-to-date/" target="_hplink">Source: TED Blog</a>

  • #2 - Jill Bolte Taylor's Stroke Of Insight

    Hear how brain researcher Jill Bolte Taylor was able to watch as her own body shut down during a stroke -- and then learn how she slowly recovered. Total views: 10,409,851 Year released: 2008 <a href="http://blog.ted.com/2012/08/21/the-20-most-watched-ted-talks-to-date/" target="_hplink">Source: TED Blog</a>

  • #1 - Ken Robinson Says Schools Kill Creativity

    The most-watched TED video to date features British creativity expert Sir Ken Robinson. In his lecture, he explains how education can foster creativity instead of thwart it. Total views: 13,409,417 Year released: 2006 <a href="http://blog.ted.com/2012/08/21/the-20-most-watched-ted-talks-to-date/" target="_hplink">Source: TED Blog</a>

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