The 19th century biologist Ernst Haechel had flamboyantly false ideas about race but discovered thousands of species and coined the terms ecology, phylum, and stem cell. How do we reconcile his errors and his contributions? A conversation with two marine scientists at the American Museum of Natural History about being wrong. Music from Robert Duncan and Carl Meyer.

• •  Person: Mandë Holford
  •  Place: Hudson Canyon
  •  Thing: 2 Haechel drawings
  •  Randy’s Thing: a turtle