Picture the Earth’s crust and you most probably think of dense, dry rock. You don’t imagine a goey, honey-like substance trickling down into the planet’s deep underbelly.

Key Takeaways ・Earth’s deep-sea hydrothermal vents provide a model for understanding how life could exist on Europa. ・Holden’s team is studying how vent microbes generate energy using ...

Similar deep-sea volcanoes found on Earth support microbial life that lives inside solid rock without sunlight and oxygen. Some of these microbes, called thermophiles, live at temperatures hot ...