Astronomy
The Atmospheric Chemistry of Titan's Methane Lakes
Quick fact
Titan's lakes are not made of water but of liquid methane and ethane, and they are replenished by a methane rainfall that is part of a cycle eerily similar to Earth's water cycle.
Why this is interesting
Imagine a world where rain falls not as water, but as liquid methane, pooling into lakes that glow under a hazy orange sky. Titan, Saturn's giant moon, is such a place—but what chemistry keeps those lakes and rains going?