5 ARE THEY WINNING THE FIGHT AGAINST BREAST CANCER?
This is now the leading cause of cancer death among women in the U.S.A.; other lands also have a high ratio. Last year, some 500 international specialists met to compare notes as to detection and treatment. What were their views?
16 TRAFFIC LAWS OF THE PLANETS—WHO MADE THEM?
Johannes Kepler’s discovery of three basic laws that govern planetary motion provided an important basis for modern space technology. What did he conclude as to the origin of these laws?