Click to share on Tumblr (Opens in new window)

Click to share on Pinterest (Opens in new window)

Click to email this to a friend (Opens in new window)

Click to share on Reddit (Opens in new window)

Click to share on LinkedIn (Opens in new window)

Click to share on Facebook (Opens in new window)

Click to share on Twitter (Opens in new window)

UPDATED: To see all these talks at one click, check out our updated Playlist: The 20 Most Popular Talks of All Time.

As 2013 draws to a close, TED is deeply humbled to have posted 1600+ talks, each representing an idea worth spreading. So which ideas have had the most widespread impact? Below, a look at the 20 most-watched talks as of December 2013. These viewership numbers include all the platforms we track: TED.com, YouTube, iTunes, embed and download, Hulu and more.

Some fascinating things to notice on this list, if you’d like to compare and contrast it to the most popular talks in 2012, and to the list we shared back in 2011: Amy Cuddy, Susan Cain, David Blaine and Pamela Meyer are all newcomers to the list, with Cuddy’s talk storming to spot #5 thanks to you sharing it. Meanwhile, Brene Brown’s talk has doubled in its number of views since 2012, with Simon Sinek and Mary Roach’s talks coming close to that line. And finally, Ken Robinson’s classic talk? Well, it has been played nearly 9 million times since last year alone.

But what really makes this list so incredible is the fact that it spans so many areas of interest, from education to happiness, statistics to creativity, tech demos to illusions. We love that this list revels in the wonders of the human brain, as well as in the incredible creatures of the deep sea, and far beyond.