In Essence

In Essence | Winter 1980
Washington's War on Cancer

ElizabethWashington's Whelan. in Policy Review (Fall 1979). The ~oundation,513 C St. 'N.E.,

War on Cancer ~erita~'e
Washington, D.C. 20002.
Most measures federal regulators to protect workers and consumers from cancer-causing chemicals overlook obvious facts about cancer. So contends Whelan, a researcher at the Harvard School of Public Health.
The Food and Drug Administration bans any food additive that in- duces cancer in any animal species at any dose level. The Occupational Safety and Hea...

In Essence | Winter 1980
Molecular Detectives

ElizabethWashington's Whelan. in Policy Review (Fall 1979). The ~oundation,513 C St. 'N.E.,

War on Cancer ~erita~'e
Washington, D.C. 20002.
Most measures federal regulators to protect workers and consumers from cancer-causing chemicals overlook obvious facts about cancer. So contends Whelan, a researcher at the Harvard School of Public Health.
The Food and Drug Administration bans any food additive that in- duces cancer in any animal species at any dose level. The Occupational Safety and Hea...

In Essence | Winter 1980
Metals with Memories

PERIODICALS
SCIENCE & TECHNOLOGY
write Zihlman, an anthropologist at the University of California, Santa Cruz, and Lowenstein, associate clinical professor of medicine at the University of California, San Francisco. It can tell researchers if a sus- pected human ancestor walked upright or on all fours. A tooth, on the other hand, can be deceiving; the teeth of the prehistoric chalicothere, for instance, led anthropologists to believe it was an ancestor of the horse until they discovered...

In Essence | Winter 1980
Sovereignty in Space

body heat, it gradually reverts to screen shape and prevents blood clots from reaching the heart.
Shape-memory alloys may even help solve future energy shortages, says Schetky, a metallurgist at the In- ternational Copper Research Associa- tion. In tropical oceans and large res- ervoirs behind hydroelectric dams, alloy rods could be alternately low- ered to cold deep waters and raised to warmer surface waters. The resulting
Heated, this antenna metal contractions, he suggests, could regains its...

In Essence | Winter 1980
The Red Ocean
In Essence | Winter 1980
The Trouble with Gasohol

IODICALS

SCIENCE & TECHNOLOGY
tution. Within 25 million years, the Persian Gulf will disappear as a widening "Red Ocean" pushes Saudi Arabia into Iran.
Scientists disagree over how the Red Sea, now about 190 miles across at its widest point, was formed. Some argue that, because the facing coastlines fit together nicely, the Asian and African continents, once united, broke apart abruptly. Others say that the African and Arabian tectonic plates separated gradually, their edges stretching a...

In Essence | Winter 1980
Acid Rain

Gene E.Likens, Richard
F. Wright, James N. Galloway, and Thomas J. Butler, in ScientificAmerican (Oct. 1979), 415 Madison Ave., New York,
N.Y. 10017.
In parts of the Eastern United States and Western Europe, rain and snow now fall as dilute solutions of sulfuric and nitric acids. A by-product of the burning of fossil fuels in power plants, the problem of "acid rain" is expected to worsen as industrialized countries become more dependent on coal, say ecologists Likens, Wright, Galloway,...

In Essence | Winter 1980
Saving Energy on the Stove

Mary Rawitscher and Jean Mayer, in
on the Stove Technology Review (Aug.-Sept .1979), Massachusetts Institute of Technology,
-".
Cambridge, Mass. 02139.
Three to 5 percent of total US. energy output (e.g., equivalent to the energy produced the nation's hydroelectric plants) is consumed pre- paring food at home. Much of that energy could be saved if Americans changed their cooking and eating habits, write nutritionists Rawitscher and Mayer.
Certain culinary techniques waste more energy...

In Essence | Winter 1980
Growing Oil

Mary Rawitscher and Jean Mayer, in
on the Stove Technology Review (Aug.-Sept .1979), Massachusetts Institute of Technology,
-".
Cambridge, Mass. 02139.
Three to 5 percent of total US. energy output (e.g., equivalent to the energy produced the nation's hydroelectric plants) is consumed pre- paring food at home. Much of that energy could be saved if Americans changed their cooking and eating habits, write nutritionists Rawitscher and Mayer.
Certain culinary techniques waste more energy...

In Essence | Winter 1980
Managing the Forests

William F. Hyde, in Policythe Forests Analysis (Summer 1979), University of
California Press, Berkeley, Calif. 94720.
Inefficient forest management has spurred government predictions of a "timber famine" the year 2000 in the Pacific Northwest, source of one-fourth of the annual U.S. timber harvest.
No such famine need occur, argues Hyde, a research associate at Resources for the Future. Annual harvests in the Northwest range from 24 million to 26 million "cunits" (one cunit...

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