Word: layers
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...side (see diagram). Thin plastic tubes are then threaded through the needles (which are subsequently removed) and anchored in place by small plastic buttons at either end. The iridium-in the form of tiny "seeds" embedded in a thin, stiff nylon ribbon -is inserted into the tubes. The outer layer of the seed is a steel sheathing; it blocks dangerous ionizing beta rays (electrons), but allows the escape of the high-energy gamma rays that destroy the tumor...
...aircraft would emit such great quantities of water vapor that a permanent cloud barrier would shut out the sun; this "greenhouse" effect would dangerously raise the earth's surface temperature. There were also predictions of skin cancer epidemics: nitrogen oxides released by the SSTs would destroy the ozone layer that partly shields the earth against the sun's lethal ultraviolet radiation. Then too, the SST's fumes were denounced as a potential new cause of massive pollution...
...their ideological mecca but who have grown restive about Berlinguer's tacit support for Premier Giulio Andreotti's Christian Democratic minority government. When Carrillo recently declared that repression of dissidents showed that the "Soviet Union is not really a popular democracy but a dictatorship of a small layer of the country over the rest of the society," Berlinguer scolded him on Italian television, saying: "That is a summary judgment that I do not share...
...project, which has a $5.5 million NASA grant, calls for a kitelike framework covered by a square of plastic film measuring a huge 800 meters (2,600 ft.) on a side. The thin sail (ordinary plastic kitchen wrap is five times thicker) would be coated with an aluminum reflecting layer on the side that will face the sun, and painted a heat-absorbing black on the other side. The total weight of the sail and the instrument-packed ship mounted in a hole at its center will be only 5,000 kilograms (11,000 lbs.)-a payload that could easily...
Teilhard never recanted his basic notion about the existence of a spiritual reality that suffused all matter (man and animals included) and had evolved into a "noosphere"-his term for a layer of human awareness that enveloped the earth like some psychic biosphere. As this envelopment progressed, Teilhard believed, man would eventually transcend his individualism and converge at the "Omega Point" with the Omega -God. Instead of God's creation at the beginning of time, Teilhard emphasized instead his ongoing and future creative activity. To orthodox critics, this vision destroyed the distinction between man and nature, and veered perilously...