Results come from Exumo's own index. Data from YouTube; Exumo is not affiliated with YouTube.

1. 18:17

   Loretta Napoleoni: The intricate economics of terrorism

   TED · Dec 14, 2009 · 58.2K views

2. 7:38

   Shereen El Feki: Pop culture in the Arab world

   TED · Dec 11, 2009 · 146K views

3. 19:59

   Thulasiraj Ravilla: How low-cost eye care can be world-class

   TED · Dec 10, 2009 · 43.2K views

4. 15:52

   Rory Bremner's one-man world summit

   TED · Dec 8, 2009 · 115.5K views

5. 13:13

   The fight against sex slavery | Sunitha Krishnan

   TED · Dec 8, 2009 · 611.2K views

6. 11:50

   Talks Scott Kim takes apart the art of puzzles

   TED · Dec 4, 2009 · 46.6K views

7. 18:41

   Anupam Mishra: The ancient ingenuity of water harvesting

   TED · Dec 3, 2009 · 137.7K views

8. 16:57

   Andrea Ghez: The hunt for a supermassive black hole

   TED · Dec 3, 2009 · 120.1K views

9. 5:04

   How I Make Electric Igniters from Christmas Lights

   NightHawkInLight · Dec 2, 2009 · 64.5K views

10. 19:23

    Why nations should pursue "soft" power | Shashi Tharoor

    TED · Dec 2, 2009 · 1.2M views

11. 17:57

    Gordon Brown on global ethic vs. national interest

    TED · Dec 1, 2009 · 51K views

12. 18:22

    Mallika Sarabhai: Dance to change the world

    TED · Nov 26, 2009 · 137.8K views

13. 14:16

    Magnus Larsson: Turning dunes into architecture

    TED · Nov 26, 2009 · 84.5K views

14. 17:20

    Asia's rise -- how and when | Hans Rosling

    TED · Nov 25, 2009 · 422K views

15. 17:58

    Rob Hopkins: Transition to a world without oil

    TED · Nov 24, 2009 · 177.3K views

16. 11:58

    Tom Wujec demos the 13th-century astrolabe

    TED · Nov 20, 2009 · 181.7K views

17. 19:56

    East vs west -- the myths that mystify | Devdutt Pattanaik

    TED · Nov 19, 2009 · 819.6K views

18. 15:20

    The thrilling potential of SixthSense technology | Pranav Mistry

    TED · Nov 18, 2009 · 5.5M views

19. 8:10

    Cynthia Schneider: The surprising spread of "Idol" TV

    TED · Nov 13, 2009 · 40K views

20. 6:12

    Edward Burtynsky photographs the landscape of oil

    TED · Nov 13, 2009 · 45.7K views