Scientific American Magazine Vol 275 Issue 4

Scientific American Magazine

Volume 275, Issue 4

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Features

Single Mothers and Welfare

For the first time since the Great Depression, large numbers of families are homeless. Recent welfare revisions will put even more women and children on the streets

Ellen L. Bassuk, Angela Browne, John C. Buckner

Microbes Deep Inside the Earth

Recently discovered microorganisms that dwell within the earth's crust could reveal clues to the origin of life

James K. Fredrickson, Tullis C. Onstott

Friction at the Atomic Scale

Long neglected by physicists, the study of friction's tomic-level origins, or nanotribology, indicates that the force tems from various unexpected sources, including sound energy

Jacqueline Krim

Controlling Computers with Neural Signals

Electrical impulses from nerves and muscles can command computers directly, a method that aids people with physical disabilities

Hugh S. Lusted, R. Benjamin Knapp

Ten Days Under the Sea

Living underwater in the world's only habitat devoted to science, six aquanauts studied juvenile corals and fought off "the funk"

Peter J. Edmunds

Charles Darwin and Associates, Ghostbusters

When the scientific establishment put a spiritualist on trial, the co-discoverers of natural selection took opposing sides

Richard Milner

Confronting Science's Logical Limits

The mathematical models now used in many scientific fields may be fundamentally unable to answer certain questions about the real world. Yet there may be ways around these problems

John L. Casti

Sounding Out Science

Marguerite Holloway

Departments

Microbes from Mars? Maybe

Letters to the Editors, October 1996

Erratum

50, 100 and 150 Years Ago: Fuel Costs, Cycling Without Breaks and Discovery of Anesthesia

Bugs in the Data?

Fish Fight

Building a Better T-Bone

In Brief, October 1996

A Spinning Crystal Ball

On the Tail of the Tiger

Hurricane Hullabaloo?

Soil Erosion of Cropland in the U.S., 1982 to 1992

Just Say NO

Unicorn Hunts?

Television by Any Other Name

"X" (Rays) Mark the Tumor

Picking on Cotton

Programming with Primordial Ooze

Recently Netted...

Probing Medicine's Outer Reaches

Working in a Vacuum

Monopoly Revisited

Reviews and Commentaries--Mistakes Were Made

New World and Old: A Matter of Magnitude

Making Your Mark

Working Knowledge on Photocopiers