Live webcast from members of the Corps of Exploration aboard the E/V Nautilus while it was at sea in the Gulf of California, aiming to explore the geological, biological and geochemical features of the recently-discovered Pescadero Basin hydrothermal vent field. Pescadero Basin is the deepest basin (3800 m) along the East Pacific Rise at the southern end of the Gulf of California, hosting an array of deep sea biological communities thriving among carbonate chimney structures, which are starkly different from the more common, sulfide-dominated mid-ocean-ridge vents.