la característica de una clase privilegiada es siempre la misma: la posesión del ocio, como única gran recompensa de su condición. - Isaac Asimov

our safest bet is that the era of high-technology communication, in the beginning of which we are now immersed, will continue to develop and amplify. We may look forward to more numerous and more versatile communications satellites, laser beams replacing microwaves in space and providing millions of times as many audio and video channels, optical fibers carrying light replacing copper wires carrying electricity, and elaborate computerization making the world more responsive to our needs.

Where history concerns mainly personalities, the drawings become either black or white according to the interests of the writer. I find it all remarkably useless.

The differentiation of science into its specialties is, after all, an artificial and man-made state of affairs. While the level of knowledge was still low, the division was useful and seemed natural. It was possible for a man to study astronomy or biology without reference to chemistry or physics, or for that matter to study either chemistry or physics in isolation. With time and accumulated information, however, the borders of the specialties approached, met, and finally overlapped. The- techniques of one science became meaningful and illuminating in another.

In the latter half of the nineteenth century, physical techniques made it possible to determine the chemical constitution and physical structure of stars, and the science of "astrophysics" was born. The study of the vibrations set up in the body of the earth by quakes gave rise to the study of "geophysics." 'Me study of chemical reactions through physical techniques initiated and constantly broadened the field of "physical chemistry," and the latter in turn penetrated the study of biology to produce what we now call "molecular biology."