Evolutionary biology: Excitation over jelly nerves

Interesting to see that evolution can and does take fundamentally different pathways, especially in terms of nervous system which was believed to have only one direction, from simple nervous system to complex human brain.
http://www.nature.com/news/jelly-genome-mystery-1.15264

also the full article here:
http://www.nature.com/nature/journal/vaop/ncurrent/full/nature13400.html