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Bleaching kills third of coral in Great Barrier Reef's north

Meet Boaty McBoatface - the drone submarine

Freediver takes record-breaking 400-foot dip

Underwater drones map algae beneath Antarctic ice

New kind of hydrothermal vent forms ghostly chimneys

Elusive sea creature with hairy, slimy shell spotted after 31 years

10 years after Hurricane Katrina, US still lacks comprehensive strategy to tackle floods, experts warn

NASA: Rising sea levels more dangerous than thought

Alien of the deep has needle-sharp teeth and a shiny head lure

Powerful El Ni帽o could mean fewer Atlantic hurricanes, experts say