Catastrophic Releases of Radioactivity
The gravest conceivable accident to a nuclear reactor is far less destructive than the detonation of a nuclear weapon, even if it is imagined that the weapon causes harm only by radiation

You are currently logged out. Please sign in to download the issue PDF.
The gravest conceivable accident to a nuclear reactor is far less destructive than the detonation of a nuclear weapon, even if it is imagined that the weapon causes harm only by radiation
At a range of 10-29 centimeter the world may be a simple place, with just one kind of elementary particle and one important force. If the proposed unified theory is correct, all matter is unstable
Designing a machine that listens is much more difficult than making one that speaks. Significant improvements in automatic recognition may come only with a better understanding of human speech patterns
Laws governing natural selection of prebiotic molecules have been inferred and tested, making it possible to discover how early RNA genes interacted with proteins and how the genetic code developed
A nova (as distinct from a supernova) is a white-dwarf star that blows off a shell when a companion spills fresh nuclear fuel on it. The shell's spectrum is a clue to what happened
Insects of three orders hatch underwater and gather food with nets, brushes and other fine-mesh filters. They play a role in opposing the tendency of ecological systems to lose organic matter downhill
The city-states of classical Greece deployed Beets of swifi ramming galleys equipped with as many as three banks of oars. These vessels later evolved into huge weapons platforms with thousands of rowers
How is it that salts of lithium have a beneficial effect on people in a pathologically manic state? Clues to the answer may be found in the ways the lithium ion moves through the membranes of cells