Word: detectable
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Major illnesses have profoundly affected the presidency. The classic case in modern times concerns Franklin Roosevelt; he was too sick to run for a fourth term, and history would be different if he had not done so. But lesser afflictions have their effects too, though they are harder to detect...
Finally, one can detect, in public debates and legislative enactments, a renewed concern with the issue of privacy, the citizen's right to retain for himself control over personal information and choices. Opinion pollsters have lately been meeting more resistance from prospective samples; governmental investigators, with a tarnished record of misusing certain data, are under investigation themselves. Not all the effects of this new suspicion are healthy or helpful. But it does signify an uncertainty about the value of uncritically adding to the mass of information...
...attempt both to record and to foretell Baker's behavior, geologists are trying to emulate the Russians, who recently correctly predicted a volcanic eruption on the Siberian peninsula of Kamchatka. The scientists have installed seismographs on the mountain's flanks to detect the tremors that are believed to precede an eruption and set up instruments to measure the flow and the temperatures of gases escaping from the fumaroles. They are also using sensitive tiltmeters to determine if the mountain is swelling, a phenomenon that could presage an eruption...
...anti-ballistic missile defenses. Lasers could be used to sweep the skies and detect incoming missiles, and may some day be powerful enough to destroy enemy missiles in space. The day may not be too far off when lasers can blind an enemy's early warning system and leave him vulnerable to missile attack. Strong and still unexplained infra-red light detected by U.S. early warning satellites over Russia recently heightened speculation that the Soviets may be experimenting with such devices. U.S. scientists are believed to be working on a similar system...
...closeup images. The ubiquitous orange monarch, for example, is the only true round-trip migrant among the world's 20,000 species. Although only one family of butterflies is called satyrs, most males exhibit an aggressive libido as soon as they emerge from the chrysalis-they can detect females by odor, flight signals, and ultraviolet waves imperceptible to the human eye. Any colors that are perceptible are gathered here in a great rainbow of a book for collectors of butterflies, books, or examples of classic nature photography...