The discovery of abundant microbial life in the deep subsurface, where energy fluxes can be orders of magnitude lower than in laboratory cultures, challenges many of our assumptions about the requirements to sustain life. Here, Tori Hoehler and Bo Barker Jørgensen review our understanding of life in these extremely low-energy environments.
- Tori M. Hoehler
- Bo Barker Jørgensen
