03:57 Literature & Language Speech acts: Constative and performative Lesson duration 03:57 210,759 Views
04:33 History The most groundbreaking scientist you've never heard of Lesson duration 04:33 3,017,693 Views
05:21 Linguistics Are Elvish, Klingon, Dothraki and Na’vi real languages? Lesson duration 05:21 2,918,583 Views
04:18 Life Sciences The physics of human sperm vs. the physics of the sperm whale Lesson duration 04:18 4,372,380 Views
04:08 History Urbanization and the evolution of cities across 10,000 years Lesson duration 04:08 2,686,106 Views
03:47 Numbers & Operations A trip through space to calculate distance Lesson duration 03:47 155,536 Views
04:13 History Why do Americans and Canadians celebrate Labor Day? Lesson duration 04:13 595,335 Views
03:45 Earth and Space Science Four ways to understand the Earth's age Lesson duration 03:45 694,195 Views
03:50 Technology Defining cyberwarfare...in hopes of preventing it Lesson duration 03:50 117,212 Views