Word: cm
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...present federal authorities recommend a microwave exposure limit of ten milliwatts per sq. cm. But, says Dr. Moris Shore, director of the Food and Drug Administration's Division for Biological Effects, even this level may be too high. He notes that researchers are now finding birth malformations, impaired learning and locomotive ability, and altered body chemistry in lab animals exposed within the Government's "safe" limits...
...workers exposed to microwave radiation were complaining of headaches, eye pain, weariness, memory loss, and a host of other ailments. As a result, while bombarding the U.S. embassy with higher levels, the Soviets set a microwave limit for their own people of no more than ten microwatts per sq. cm, a thousand times less than the U.S. standard...
While Astronomer James Christy was examining photographic plates of Pluto last June-taken with the U.S. Naval Observatory's 155-cm (61-in.) reflecting telescope at Flagstaff, Ariz.-he noticed an elongation in Pluto's image. Checking back on photographs made in 1965 and 1970, Christy found similar stretching, always in a north-south direction relative to the earth. After further measurements, Christy and his colleague, Dr. Robert Harrington, concluded that what they were seeing was actually a moon hi a 19,300-km (12,000-mile-high) orbit around Pluto. The great distance from the earth...
...dazzling collection includes, for example, a tiny, 6.4-cm-long (2½ in.) curving sculpture of a horse carved out of a mammoth tusk; it hardly seems possible that this graceful piece, fashioned more than 30,000 years ago, is one of the oldest objets d'art ever found. No less remarkable are the voluptuous "Venus" statuettes, some of them coiffed in Stone Age chic, that date back some 27,000 years. Even the wall paintings, some of them on a larger-than-life scale, show a mastery of form and perspective that was not seen again for almost...
...comes some demanding microsurgery. The exposed artery is clamped in two places, leaving a blood-free gap 1 to 2 cm (up to about ¾ in.) long into which the freed segment of the temporal artery is sewn...