Like Earth, Titan's atmosphere is composed primarily of nitrogen, but the liquids and vapors on the moon's surface are made of methane and other organic chemicals integral to the creation of complex life.

ENGADGET

He thus put together a collection of apparatus that would not have disgraced the set of a mad-scientist horror film, and filled it with a mixture of methane, ammonia, hydrogen and water vapour that matched contemporary ideas of what the primitive terrestrial atmosphere had been composed of.

ECONOMIST: Stanley Miller