title: Searching for life in the deep shale.
authors: Elizabeth
authors: E
authors: Pennisi
mesh_terms: D044822:Biodiversity; D017753:Ecosystem; D019015:Geologic Sediments / Q000382:microbiology*; D059206:Natural Gas; D061329:Oil and Gas Fields / Q000382:microbiology*
chemical_list: D059206:Natural Gas