UK scientists exploring the ocean floor in the Caribbean have discovered an "astounding" set of hydrothermal vents, the deepest anywhere in the world.
Deploying a remotely-operated vehicle (ROV) in the Cayman Trough, they stumbled across a previously-unknown site nearly 5000m below the surface. Video pictures relayed live back to the research ship mounting the operation show spindly chimneys up to 10m high.http://www.bbc.co.uk/news/science-environment-21520404
