Biological insight into future technology - what living cells tell us

Sensory cells of cricket wind receptor are sensitive to stimulus energy of the order of K_BT (ca. 4×10^-21 Joule at 300 °K). Due to this high sensitivity at the ultimate limit of thermodynamics, the mechanoreceptors are facing to thermal noise. Based on this kind of biophysical measurements on the signal to noise ratio or the rate of information transmission of neurons, design principle of the nervous system is discussed. Biological systems evolved under the inevitable thermal noise will teach us a design principle for future information communication technology that will certainly face with thermal noise and other stochastic uncertainty such as quantum noise. Future technology needs wide and sound bases of natural sciences, not only of physics, chemistry and mathematics, but also of biology, the field of science that tells us what kind of design is possible in this world.