Video · Tides: Crash Course Astronomy #8 TwitterShare on Facebook643 967 875 views Crash Course - March 5, 2015 Science Crash Course Gravity More Videos What is Plate Tectonics: Crash Course Geology #10 Science · 1 week ago What is Plate Tectonics: Crash Course Geology #10 Science · 1 week ago How Water Shapes the Land: Crash Course Geology #9 Science · 2 weeks ago How Water Shapes the Land: Crash Course Geology #9 Science · 2 weeks ago Who Will Make It To The Finish!? Red Bull Soapbox Race Denver LIVE REPLAY Xtrem · 3 weeks ago Myths About Diamonds: Crash Course Geology #8 Science · 3 weeks ago How Do Gems Form?: Crash Course Geology #7 Science · June 4, 2026 How Do Gems Form?: Crash Course Geology #7 Science · June 4, 2026