Vast and trembling, fighting against the high, thin winds of the atmosphere and burning through the long-chain hydrocarbons that were the fuel of their lifetimes, their membranes unfolded, stabilized, and turned with something like devotion to the half-mind. Under its direction, they shuddered, the pressure waves of their trembling designed to harmonize as they reached the surface of the planet into a single, clear, and unechoing voice.