Even basic evolutionary trees reveal insights into how different species are connected. Learn how to interpret and create them in this tutorial.

Play the Evolution Lab: http://www.pbs.org/nova/labs/lab/evolution/

Find discussion questions for this video and other resources in the Evolution Lab collection on PBS LearningMedia: http://www.pbslearningmedia.org/resource/nvev-sci-trainingtrees/training-trees/

NOVA Labs Facebook: https://www.facebook.com/theNOVALabs NOVA Labs Twitter: https://twitter.com/theNOVALabs

Credits: Ari Daniel, Writer/Narrator/Producer Greg Kestin, Assistant Producer and Animator Tilapia Film, Titles APM Music, Music Video clips are screen grabs from NOVA’s Evolution Lab Cushion sea star images: John Coney