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Reviews the contributions of Mendel, the Hertwigs, and Miescher to our understanding of modern genetics. Discusses chromosome chemistry in terms of the cytological distribution of nucleic acids, t...
Portrays the frequency of mutants in the population gene pool as dependent upon their rate of origination and selection coefficient. Discusses the population fate of dominant lethals (retinoblasto...
Explains the nature and importance of population genetics. Derives the Hardy-Weinberg equilibrium principle for Mendelian (cross-breeding) populations. Points out that though the Hardy-Weinberg la...
Descusses the economic concepts related to land, climate, and major resources in the countries of Colombia, Venzuela, and the three Guianas. Includes scenes of the people and of their ways of life,...
Dr. Howard returns as Dr. Harbaugh's guest. With a model of a valley and synthetic ice, they simulate two types of glaciers in order to show the geologic work done by flowing ice. They point out ar...
Drs. Gould and Zumberge discuss the extent,volume, structure and general dynamics of the Antarctic ice cap. Dr. Zumberge explains the techniques of the glaciologist and illustrates with film taken ...
In this program, criminologist Joseph D. Lohman states that parole is to many people only “a legal escape route” from the prison to the free community and he indicates that a parole system should b...
Should babysitters be young or old –teenagers or grandparents? Can grandparents be good babysitters? What do children need from a babysitter? Why do grandparents “spoil” their grandchildren? Mrs. M...
Reviews Greek history by showing pieces of sculpture from each historical period from 300 B.C. to A.D. 300 and the related architecture. Sculpture proceeded from small animals buried in tombs to la...
Shows the location and physical features of Greenland; explains its new position in the modern world as the center of the short polar air routes. Portrays the life of the Greenlanders, explains the...
