Underwater creatures—snapping shrimp, bearded seals, and more—populate the soundscape here, alongside the ghost voice of biologist Lynn Margulis, who rails against authority, societal amnesia, and easy answers. Margulis considers the genesis of complex entities, from maternally-inherited mitochondria to chloroplasts in green algae, and the potential obliteration of our species. Heredity does not always leap over oblivion, as Thomas Hardy imagined, to carry forward “trait and trace, through time to times anon."