I had a thought and was wondering if it's viable to detecting whether or not life exists in Titan's hydrocarbon seas, whether we get direct evidence or not. Titan lakes are hydrocarbons, which likes to create twisted polymer chains. Nature (lightning, cosmic rays...) should produce polymers that twist to the left and to the right in equal quantities. If we take a sample of a Titan lake could we shine polarized light through it to detect the concentration of twisted polymers in both the right and left directions? If only natural processes exist on Titan, the concentrations should be more or less equal, however, if evolutionary processes exist, life-form will only produce the polymer in the same handedness as it's parent, ergo there should be a subset of polymers that exist in one direction in significantly higher quantities than the other.