Word: layered
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...bureaucratic layer after layer" which Rappaport condemns is actually thinner than it should be, Merkowitz said, especially in the area of student loans, a main aspect of the Education Department's activity...
...Heaney does literally dig in many of his poems, stripping away the soil layer by layer and showing us the peat, potatoes, bones, down to the "wet centre" of "Atlantic seepage...
Starting out early one recent morning in Hell Creek, Horner points to a black line in the layer cake of geologic deposits. "That's the Tertiary- Cretaceous boundary," he advises a newcomer. "There's nothing above there but a lot of old mammals. Gives dinosaur people nosebleeds to go up that high." Farther down, at the tyrannosaurus site, his crew of graduate students and preparators are already chinking and clanging into the sandstone with jackhammers, pickaxes, shovels, chisels and ice picks. The workers are at it from 7:30 to 4:30, six days a week, with a fine gray...
...skin's dynamic outer layer, or epidermis, serves as the staging ground for all three of the major skin cancers. Both basal-cell and squamous-cell carcinomas arise from the most common skin cells, the keratinocytes, which form at the base of the epidermis and work their way toward the surface. Near the base, they are plump and are called basal cells. But as they move outward, they flatten to become the squamous cells that form the skin's tough, protective surface. Melanomas spring from melanocytes, cells that produce pigment...
Geography also plays a role in skin cancer. Equatorial regions, where the midday sun beams down from directly overhead, receive the most intense ultraviolet radiation. Farther north or south, solar rays strike the earth at a more oblique angle, taking a longer passage through the atmosphere, where the ozone layer absorbs more of the ultraviolet light before it can reach the surface...