The average seashell found along a shoreline is fixed at the same frequency as the body of water that birthed it. When held to the ear, the same, steady undulation of waves can be heard, sliding in and out of time. For this reason, they make excellent souvenirs for tourists, providing instant access to memories of better climes.

Meanwhile, the spiraling apex of a black conch’s shell can be twisted in several places like a radio’s dial. The larger the mussel, the more precision that can be attained while tuning its abandoned hermitage.

Among alligators and crocodiles alike, there exist elders who remember the flavor of mammoth's blood, and even some whose gnarled backs bear scars from the fire of an asteroid's impact. Their kind have persisted for untold millions of years, long enough for evolution to nest their brains within our own like matryoshka dolls.

The human body is not a mere brain-driven machine of nerve and bone. Every subsection of its anatomy is an independent ecosystem of organisms (or organism-like structures), each with their own motivations and metabolisms. Though much of this zoology occurs beneath a veil of skin, it is still a phenomenon that can be seen with the naked eye. When one looks upward into cloudless daylight, they just might see the spectral outlines of lifeforms known as lucigens.