Summary:

- Researchers have discovered the first animals living under the seafloor near hydrothermal vents, including tubeworms and snails.
- These animals thrive in the extreme conditions of the seafloor, where they rely on chemosynthetic bacteria for energy rather than photosynthesis.
- The discovery provides insights into the diversity of life that can exist in these harsh, high-pressure environments, expanding our understanding of the limits of life on Earth.