July 14, 1969
Ten percent of the world's food is eaten each year by insects. There are an estimated billion billion insects in the world, and so...Read more
July 21, 1969
Plant life cannot sustain all the creatures in the sea. Animal life can and does. In the sea the struggle to survive begins at bir...Read more
July 28, 1969
One-seventh of the total land surface of the earth is desert, forbidding, inhospitable. Under the relentless sun it seems that not...Read more
August 4, 1969
Like man, animals are very aggressive. They fight each other for possessions, for power within the group, for territory. Unlike ma...Read more
August 11, 1969
The beaver builds a dam across a river: it changes the local environment, but it's small change compared to man. When he builds a ...Read more
August 18, 1969
Normal children are learning far more, and at a far faster rate, than most adults realize. Today psychologists are watching and le...Read more
August 25, 1969
Only recently has science uncovered the 'DNA Molecule,' and 'broken the genetic code.' What does this mean? Riddle of Heredity tra...Read more