Video · Social Influence: Crash Course Psychology #38 TwitterShare on Facebook827 1 577 800 views Crash Course - November 11, 2014 Science Crash Course More Videos How Do Mountains Form?: Crash Course Geology #11 Science · 3 days ago What is Plate Tectonics: Crash Course Geology #10 Science · 2 weeks ago What is Plate Tectonics: Crash Course Geology #10 Science · 2 weeks ago How Water Shapes the Land: Crash Course Geology #9 Science · 3 weeks ago How Water Shapes the Land: Crash Course Geology #9 Science · 3 weeks ago Myths About Diamonds: Crash Course Geology #8 Science · June 11, 2026 How Do Gems Form?: Crash Course Geology #7 Science · June 4, 2026 How Do Gems Form?: Crash Course Geology #7 Science · June 4, 2026