For Nautilus Magazine, I wrote about a question that has obsessed me: What are the oldest surviving ecosystems on Earth?
Turns out some extant meadows, reefs, and rainforests have persisted for hundreds of thousands to *tens of millions* of years.
What can they teach us?
nautil.us/the-oldest-e...
Makes me wonder about the longest-lived environments in the fossil record. How long did it take for that mud-mound reef to accumulate its stratigraphic thickness? For how many millions of years did stromatolites carpet a bay in the Proterozoic? How much time is in a layer of coal in deltaic sand?