  Many living organisms on Earth are strongly dependent on water, the natural
liquid of the planet. A possible reason for that could be the conjecture of
Ryoji Takahashi [Phys. Lett. A 141, 15 (1989)] that water microdrops release
negentropy through a phase transition to a phase with zero surface tension.
Biological cells could make use of such a phase transition in their duty cycle.
We comment on the relative merit of this conjecture, and present it in wider
theoretical context.
