Comb jellies may be the oldest animal lineage.

Every textbook diagram of how nervous systems evolved would need redrawing.

The 700-million-year-old lineage runs its neurons on a different set of neurotransmitters than every other animal.

That chemistry is the evidence for a second, independent origin of thinking tissue.

How each outlet framed it
Quanta Magazine leans favorable
positions ctenophores as model organisms for understanding nervous system evolution and bioluminescence across diverse habitats

Sources: Quanta Magazine