title: Molecular signals from ancient materials: challenges to deep-biosphere and paleo-environmental research--a response to the comments of Sinninghe Damsté and Coolen.
authors: Subground Animalcule Retrieval (SUGAR) Program, Extremobiosphere Research, Center, Japan.
authors: Fumio
authors: F
authors: Inagaki
authors: Kenneth H
authors: KH
authors: Nealson