Scientific American Magazine

It consists of the processes that provide housing by means other than new construction. If state and local laws gave this activity more scope, many affordable dwelling units would be available

Difficult problems posed by vast distances, low light levels, aging equipment and mechanical breakdowns were solved by radio control trom the ground as the Voyager 2 spacecraft hurtled toward Uranus

In which radio signals emitted by quasars billions of light-years a way serve as benchmarks fo r measuring the earth s wobble, tiny changes in its spin rate and the imperceptible drift of its plates

It was long thought that every cellular reaction is catalyzed by a protein enzyme. The discovery that RNA can cut, splice and assemble itself overturns the principle-and throws light on early evolution

It could give mathematical consistency to the standard model-the theory that describes the in teractions of fun dam en tal particles. The search for the elusive particle will require new accelerators

Most fish species perished when the Antarctic Ocean turned cold and icy, but fishes of one suborder, Notothenioidei, met the challenge. They survive by making biological antifreezes and conserving energy

The seemingly effortless ability to perceive meaningful wholes in the visual world depends on complex processes. The features automatically extracted from a scene are assembled into objects

The two men are often honored as martyrs to science, but for Bruno astronomy was a vehicle for politics and theology. Galileo was tried partly because his aims were mistakenly identified with those of Bruno