05:21 Linguistics Are Elvish, Klingon, Dothraki and Na’vi real languages? Lesson duration 05:21 2,921,811 Views
04:18 Life Sciences The physics of human sperm vs. the physics of the sperm whale Lesson duration 04:18 4,373,648 Views
10:16 Earth and Space Science Questioning the universe - Stephen Hawking Lesson duration 10:16 86,456 Views
15:24 Science & Technology Natural pest control ... using bugs! - Shimon Steinberg Lesson duration 15:24 17,648 Views
15:28 Social Studies America's native prisoners of war - Aaron Huey Lesson duration 15:28 124,760 Views
04:08 History Urbanization and the evolution of cities across 10,000 years Lesson duration 04:08 2,732,254 Views
12:23 Design, Engineering & Technology The game layer on top of the world - Seth Priebatsch Lesson duration 12:23 17,773 Views
12:45 The Arts The true power of the performing arts - Ben Cameron Lesson duration 12:45 24,744 Views
03:47 Numbers & Operations A trip through space to calculate distance Lesson duration 03:47 156,037 Views
10:48 Motivation and Emotion The surprising truth about what motivates us Lesson duration 10:48 19,887,130 Views
04:13 History Why do Americans and Canadians celebrate Labor Day? Lesson duration 04:13 598,574 Views
03:45 Earth and Space Science Four ways to understand the Earth's age Lesson duration 03:45 706,817 Views
