Before revision: The discovery of biological communities at low temperature warm vents at 21°N, populated by a benthic community the same or similar to that discovered at the Galapagos Spreading center, established that life forms found at the Galapagos were not unique.
After revision: The discovery of biological communities at low temperature warm vents at 21°N, populated by a benthic community the same or similar to that discovered at the Galapagos spreading center, established that life forms found at the Galapagos were not unique.