## Metadata - Author: [[Helen Scales]] - Full Title: Spirals in Time - Category: #books ## Highlights - All things considered, the mighty mollusc lineage has been going for at least half a billion years, and in all that time these super-abundant, super-diverse animals have kept some secrets to themselves. We still don’t really know how the different groups – the bivalves, cephalopods, chitons and so on – are related to each other, and we don’t know for sure which of them came first. ([Location 419](https://readwise.io/to_kindle?action=open&asin=B00SJ90AN6&location=419))