Astronomy
The Carbon Cycle on Enceladus and Its Implications for Life
Quick fact
NASA's Cassini spacecraft detected molecular hydrogen in Enceladus's plumes, a strong sign of hydrothermal activity that could supply chemical energy for life.
Why this is interesting
Beneath the frozen crust of Saturn's moon Enceladus, a hidden ocean churns with carbon-rich chemistry—could this cycle be the spark of life?