User blog comment:Siberian Subnautican/Precursor Designs!/@comment-107.193.100.81-20170218080405

Try to do a plant-based design for your next one. A Data Download states "Was grown from seed 1'708 earth years ago", suggesting the Precursors might've been part plant in some way. Speculation, I know, but i still think it would be cool to see something like that.