Expedition 15 Hot Topics

Light Snacks and Food Chemistry: Photosynthesis and Chemosynthesis
Where there is no light, life must find ways to survive that do not rely on photosynthesis. Some animals are able to convert chemicals that are usually considered poisonous. Learn more »

Vent Ecosystems
The organisms that live at deep-sea hydrothermal vents seem strange and exotic, but the roles they play there are similar to the roles played by other species in ecosystems on land. Learn more »

You Feed Me, I Feed You: Symbiosis
Many animals in the deep sea rely on others for food or shelter or both. These symbiotic relationships make the deep a complex and fascinating place to study. Learn more »