Hydrothermal vents, often called 'black smokers,' are not only windows for Earth's energy release but also cradles of deep-sea chemosynthetic ecosystems.

• Key Findings: Over 700 active hydrothermal sites have been confirmed, mostly concentrated on fast-spreading mid-ocean ridges.
• Tech-Driven: Advances in ROVs and AUVs have led to more discoveries in the last decade than in the previous forty years combined.
• Trivia: The density of vents in the Pacific far exceeds that of the Atlantic, largely due to intense subduction at the Pacific Plate boundaries, making it a global 'hotspot' for marine geoscience research.