Scientific American Magazine Vol 291 Issue 2

Scientific American Magazine

Volume 291, Issue 2

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Features

Back to the Future of Cereals

Genomic studies of the world's major grain crops, together with a technology called marker-assisted breeding, could yield a new green revolution

Stephen A. Goff and John M. Salmeron

Arsenic Crisis in Bangladesh

Arsenic in drinking water could severely poison 50 million people worldwide. Strategies being tested in Bangladesh might help prevent the problem

A. Mushtaque R. Chowdhury

Nuclear Bunker Buster Bombs

New burrowing nuclear weapons could destroy subterranean military facilities--but their strategic and tactical utility is questionable

Michael Levi

Electrodynamic Tethers in Space

By exploiting fundamental physical laws, tethers may provide low-cost electrical power, drag, thrust, and artificial gravity for spaceflight

Enrico Lorenzini and Juan Sanmartín

Next Stretch for Plastic Electronics

Organic semiconductor devices can make more than just bendable displays. They will find use in wearable electronics, chemical sensors, skin for robots and innumerable other applications

Graham P. Collins

Virtual-Reality Therapy

Patients can get relief from pain or overcome their phobias by immersing themselves in computer-generated worlds

Hunter G. Hoffman

Questions That Plague Physics: A Conversation with Lawrence M. Krauss

Lawrence M. Krauss speaks about unfinished business

Departments

Erratum

Data Points: SetiHome at Five

Brief Points: August 2004

Ask the Experts: August 2004

The Green Gene Revolution

Middle of the Country

From Finish to Start

Miracle on Probability Street

One Hundred Years of Magnitude

Penny-wise Smart Labels

Crippled but Not Crashed

Seeing Inside

Oppenheimer Judged -- Kelvin Corrected -- Agassiz Contradicted

Speaking for the Animals

Letters