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Nuclear Bunker Buster Bombs

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

By 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

By 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

By Graham P. Collins

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

By A. Mushtaque R. Chowdhury

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

By Stephen A. Goff and John M. Salmeron


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