David Grinspoon Energy Quotations

They might do photosynthesis in the ultraviolet as opposed to the visual spectrum. It's a tremendous amount of energy if you can make use of it instead of being killed by it. It's unusual, but natural selection makes the best out of adversity.

In environments that are energy-rich but liquid-poor, like near the surface of Titan, natural selection may favor organisms that use their metabolic heat to melt their own watering holes.