Astronomy
The Possibility of Silicon-Based Life on Titan's Hydrocarbon Lakes
Quick fact
On Titan, Saturn's largest moon, the surface temperature is about -179°C (-290°F), cold enough for methane and ethane to exist as liquids, forming vast lakes and seas – the only stable bodies of liquid on any world other than Earth.
Why this is interesting
Imagine a world where rivers run with liquid natural gas and rain falls as gasoline. Could life exist in such a place without water?