The Hespérides is off to sea, beginning its research journey around the world. Credit: Joan Costa/CSIC
The most comprehensive expedition ever undertaken to assess the state of the planet's oceans set sail this week, on Tuesday (Dec. 15), from the Spanish port of Cadiz.
- Infographic: Tallest Mountain to Deepest Ocean Trench
- Image Gallery: Creatures from the Census of Marine Life
- In Images: Expedition to the Great Barrier Reef