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How Man came to North America

It is assumed that he traveled from Asia, but exactly what route did he take? The first of two articles on the prehistoric Americans by two investigators of them

By Ralph Solecki

The Human Body in Space

Scientists and engineers have long considered the problems of flight to other planets. As the reality of space travel slowly draws closer, they particularly weigh its effects on man's earth-conditioned frame...

By Heinz Haber


The whiplike appendages of bacteria are among the smallest living structures. They behave like tiny muscles, so they are studied to reveal the basic properties of this and other contractile proteins...

By W. T. Astbury

The Economics of Atomic Power

An account of the first thorough inquiry into the potential usefulness of nuclear fuels in various industries and many parts of the world

By Sam H. Schurr


It is a measure of acidity and alkalinity that is indispensable in research and industry. Its real meaning is nonetheless little appreciated

By Duncan A. MacInnes

Red Dog, Blackjack and Poker

Three card games are considered in the context of a modern mathematical theory. Warning: the theory does not provide a blueprint for winning

By David Blackwell and Richard Bellman

An Explanation of Twins

From the standpoint of the biologist single births are just as remarkable as multiple births, but the latter provide a clue to the processes responsible for both

By Gunnar Dahlberg

The Eelgrass Catastrophe

Twenty years ago this weed of the sea began to disappear from the Atlantic coast. The far-reaching effects of its absence exemplify the interdependence of living things

By Lorus J. and Margery J. Milne


  • 50 and 100 Years Ago: January 1951

  • Science and the Citizen: January 1951

  • Letters

    Letters to the Editors, January 1951

  • Recommended


  • Amateur Scientist

    The Amateur Astronomer

  • Departments


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