In the world of ecology, the only constant is change - but change can be good. Today Hank explains ecological succession and how ecological communities change over time to become beautiful, biodiverse mosaics. Like Crash Course on Facebook! www.facebook.com/YouTubeCrashCourse Follow Crash Course on Twitter! www.twitter.com/TheCrashCourse Table of Contents 1. Primary Succession 1:56:1 2. Secondary Succession 3:36 3. Climax Community Model 5:11 4. Intermediate Disturbance Hypothesis 7:25:1 References and image licenses for this episode can be found in the Google document here: dft.ba/-381q Support CrashCourse on Subbable: subbable.com/crashcourse