Pulsars
These newest astronomical mystery objects emit radio pulses with a spacing so regular they could be used as clocks. They may be fuel-depleted stars that are pulsating or rotating
Features
Surgery for Coronary Disease
There are three main surgical approaches to coronary artery disease: (1) providing the heart muscle with an alternative supply of blood, (2) repairing the diseased artery and (3) repairing the damaged heart
Chemical Accelerators
The nature of chemical reactions at all energies is opened to study by these new devices. They produce beams of molecules, atoms or ions that are made to react under precisely controlled conditions
The Synthesis of DNA
Test-tube synthesis of the double helix that controls heredity climaxes a half-century of effort by biochemists to re-create biologically active giant molecules outside the living cell
Cargo-Handling
Mechanization and containerization, with emphasis on facilitating the transfer of cargo between land vehicles, ships and airplanes, have become strong trends in both national and international trade
How Fast can Computers Add?
Computers today add at a rate of 10 million calculations per second and will soon add even faster. Mathematical analysis can now predict the best performance attainable by any computer, present or future
Air-breathing Fishes
Lack of oxygen in water forced certain Devonian fishes to develop air-breathing organs. Some left the water and colonized the land; descendants of others are today's remarkable air-breathing species
Homo Monstrosus
For 2,000 years most educated men believed that remote areas were inhabited by monstrous races. It was only with the 19th century that it became clear that there was only one species of living men
Departments
50 and 100 Years Ago: October 1968
Science and the Citizen: October 1968
- Letters
Letters to the Editors, October 1968
- Recommended
Books
- Mathematical Recreation
Mathematical Games
- Amateur Scientist
The Amateur Scientist
- Departments
The Authors
Bibliography
