Crocodiles, and birds, and dinosaurs—oh my! While classifying organisms is nothing new, phylogeny— or, grouping organisms by their evolutionary relationships—is helping us see life in a whole new light. In this episode of Crash Course Biology, we’ll learn why this kingdom-phylum stuff is going out of style and why phylogenetic trees are in.

Chapters:
The Platypus & Phylogeny 0:00
Taxonomy 1:33
Systematics 2:44
Phylogeny & Genetics 4:32
Dr. Motoo Kimura 5:31
Phylogenetic Trees 6:56
The Complexities of Evolution 10:49
Review and Credits 12:43

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