Sunday Night Movie: Watching Arachnids Evolve

I saw this short video at a conference last year and was entranced. The clip shows how the ancestral arachnid body plan changed as it evolved through various descendant lineages.

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Yeah, I noticed that. Where should they go in the tree?

Thanks! This was AWESOME =D

Hmmm... someone should do these for as much of the tree of life as possible! Some place where you can just click and watch your favourite lineage evolve through time!