News
- Tech
Civilians get better GPS
President Clinton directed the Defense Department to stop degrading signals from 24 Global Positioning System satellites, allowing civilians to receive the same location-pinpointing accuracy long available to the U.S. military.
- Plants
New gene-altering strategy tested on corn
Scientists have created herbicide-resistant corn with a new kind of genetic engineering that involves subtly altering one of the plant's own genes rather than adding a new gene.
- Astronomy
X-ray satellite goes the distance
Using the sharp X-ray eye of an orbiting observatory, astronomers have employed a novel method to measure distance within the Milky Way.
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Leggy beetles show how insects lost limbs
Inactivating two genes in red flour beetles causes grubs to grow lots of legs—and provides clues to the puzzle of the evolution of the six-legged body plan.
