Reactor Fuel Elements
As the evolution of nuclear reactors proceeds, their fissionable material and its protective coating assume remarkably intricate forms. These are the result of subtle technological compromises...
Features
The Circulatory System of Plants
Substances required in the metabolism of plant cells not only travel up from the roots but also move about in other ways. This circulation has recently been clarified by experiments using radioactive tracers...
The Perception of the Upright
How do we know which way is up? An investigation of this question has become a study of personality, because the way in which we perceive is related to what we are like
Alfred Russel Wallace
This great 19th-century naturalist and Charles Darwin simultaneously announced the theory of evolution by means of natural selection. He later went beyond Darwin in applying the theory to human evolution...
Enteroviruses
It is now apparent that the three viruses which cause polio belong to a family of more than 50 viruses which ordinarily dwell in the human alimentary tract without causing disease
Metamorphosis, Polymorphism, Differentiation
The wondrous transformation of insects is explained by two familiar growth processes. One accounts for differences among individuals in a species; the other, for differences among tissues in an organism...
How Water Freezes
The formation of ice crystals requires not only low temperature but nuclei of appropriate size and shape. Such nuclei explain the strange diversity of snowflakes, "ice worms" and frost heaves...
Pidgin Languages
These humble by-products of colonialism are still useful in contacts between peoples. Far from haphazard grammatically, they at times evolve into national languages called creoles
Departments
50 and 100 Years Ago: February 1959
Science and the Citizen: February 1959
- Letters
Letters to the Editors, February 1959
- Recommended
Books
- Mathematical Recreation
Mathematical Games
- Amateur Scientist
The Amateur Scientist
- Departments
The Authors
Bibliography
