04:13 History Why do Americans and Canadians celebrate Labor Day? Lesson duration 04:13 Manage Library 546,478 Views
04:47 Earth and Space Science Who won the space race? Lesson duration 04:47 Manage Library 1,603,256 Views
04:26 Anthropology The contributions of female explorers Lesson duration 04:26 Manage Library 467,053 Views
17:04 Global Economics Actually, the world isn't flat - Pankaj Ghemawat Lesson duration 17:04 Manage Library 104,806 Views
08:50 History The Watergate scandal: United States vs. Nixon Lesson duration 08:50 Manage Library 48,613 Views
04:27 Data Analysis & Probability The mathematics of history - Jean-Baptiste Michel Lesson duration 04:27 Manage Library 37,071 Views
04:22 Environmental Science Who is Alexander von Humboldt? Lesson duration 04:22 Manage Library 295,056 Views
03:59 Technology How farming planted seeds for the Internet Lesson duration 03:59 Manage Library 162,042 Views
03:48 History The story behind the Boston Tea Party Lesson duration 03:48 Manage Library 1,454,983 Views
03:55 History The infamous and ingenious Ho Chi Minh Trail Lesson duration 03:55 Manage Library 958,433 Views
09:14 Sociology Does racism affect how you vote? - Nate Silver Lesson duration 09:14 Manage Library 107,120 Views
04:50 Technology Illuminating photography: From camera obscura to camera phone Lesson duration 04:50 Manage Library 465,963 Views
03:11 Visual Arts Distorting Madonna in Medieval art Lesson duration 03:11 Manage Library 116,111 Views
07:39 Anthropology The search for King Richard III Lesson duration 07:39 Manage Library 365,118 Views
03:39 Civics The historical audacity of the Louisiana Purchase Lesson duration 03:39 Manage Library 696,013 Views
19:17 Civics Learning from past presidents - Doris Kearns Goodwin Lesson duration 19:17 Manage Library 71,895 Views
15:34 Anthropology Digging for humanity's origins - Louise Leakey Lesson duration 15:34 Manage Library 38,948 Views
04:24 Physical Science Is light a particle or a wave? Lesson duration 04:24 Manage Library 1,599,854 Views