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
Volume 184, Issue 1
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Features
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
Flagella
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
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
pH
It is a measure of acidity and alkalinity that is indispensable in research and industry. Its real meaning is nonetheless little appreciated
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
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
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