Ecology

With a solid understanding of biology on the small scale under our belts, it's time for the long view - for the next twelve weeks, we'll be learning how the living things that we've studied interact with and influence each other and their environments. Life is powerful, and in order to understand how living systems work, you first have to understand how they originated, developed, and diversified over the past 4.5 billion years of Earth's history. Hang on to your hats as Hank tells us the epic drama that is the history of life on Earth. Table of Contents 1) Archaean & Proterozoic Eons 01:53 a) Protobionts 03:54 b) Prokaryotes 04:18 c) Eukaryotes 06:06 2) Phanerozoic Eon 06:42 a) Cambrian Explosion 06:49 b) Ordovician Period 07:36 c) Devonian Period 07:48 d) Carboniferous Period 08:13 e) Permian Period 09:10 References: http://www.sciencedaily.com/releases/2010/08/100823113436.htm http://forces.si.edu/atmosphere/02_02_06.html Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids