Alternative agriculture

Article Abstract:

Plant geneticist Wes Jackson founded a revolutionary concept dubbed as the perennial polyculture or natural systems agriculture. This system proposes to replace yearly crops with perennials, prairie seed-bearers, to prevent topsoil erosion and restore ecological functions of the vanished grasslands.

Research, Methods, Agriculture, Evaluation, Prairie ecology, Jackson, Wes

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The future of LEDs: color-making plastics

Article Abstract:

A research team from the University of Rochester and Xerox Corp. has developed plastic light-emitting diodes (LEDs) which could produce a variety of colors. The LEDs may be used in developing hang-on-the-wall television screens and flat-panel displays for personal computers and similar devices.

Usage, Innovations, Product development, Xerox Corp., XRX, Plastics, Light-emitting diodes, LEDs

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Land of lakes?

Article Abstract:

A description is presented of the high-resolution images taken of the planet Mars which reveal extensive layers of sedimentary rocks on the planet's surface. The early climate of the planet is discussed.

Portrayals, Mars (Planet), Natural history, Planetary meteorology

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