Skip to main content

Features

The Allocation of the Radio Spectrum

The electromagnetic spectrum from 10 kilohertz to 300 gigahertz is a natural resource of communication that must be fairly allocated. Reforms in the system of allocation are currently being considered

By Charles Lee Jackson

Transposable Genetic Elements

They bypass the rules of ordinary genetic recombination and join together segments of DNA that are unrelated, transferring groups of genes among plasmids, viruses and chromosomes in living cells

By Stanley N. Cohen and James A. Shapiro

Zapotec Writing

Among the high cultures of Mexico before the Spanish conquest was the Zapotec. Its hieroglyphs, mostly carved from 500 B. C. to A.D. 700, record the rise and decline of the Zapotec state

By Joyce Marcus

The Einstein X-Ray Observatory

This satellite, carrying an X-ray telescope of unprecedented size and sensitivity, has been aloft for more than a year. It has yielded dramatic new views of high-energy phenomena in the universe

By Riccardo Giacconi

Yellowstone Park as a Window on the Earth's Interior

Yellowstone is a "hot spot" in the earth's crust. Its strong volcanic and tectonic activity makes it a unique location for the study of processes that originate deep in the earth

By Robert B. Smith and Robert L. Christiansen

Hydrogen Storage in Metal Hydrides

The exploitation of hydrogen as a fuel for motor vehicles requires a method for storing it safely and compactly at ambient temperature. Forcing it into the gaps among metal atoms may be the best approach

By J. J. Reilly and Gary D. Sandrock

The Perception of Human Growth

How does the human head change shape from infancy to adulthood? Tests of the way most people perceive the process show that growth can be represented by a particular type of geometric transformation

By James T. Todd, Leonard S. Mark, Robert E. Shaw and John B. Pittenger

Decorator Crabs

Many species of spider crabs can camouflage themselves by patterns of behavior in which they select materials from their environment and festoon them on their shell

By Mary K. Wicksten

Departments

  • 50 and 100 Years Ago, February 1980

  • Science and the Citizen, February 1980

  • Letters

    Letters to the Editors, February 1980

  • Mathematical Recreation

    Mathematical Games, February 1980

  • Amateur Scientist

    The Amateur Scientist, February 1980

  • Departments

    The Authors, February 1980

  • Books, February 1980

  • Bibliography, February 1980

Purchase To Read More

Already purchased this issue? Sign In to Access
Select Format
February 1980