
Bogs
When a lake is filled with silt and organic debris, it gives way to a unique system of living things and their remains. These wet spots on the land may have a significant effect on world climate

Bogs
When a lake is filled with silt and organic debris, it gives way to a unique system of living things and their remains. These wet spots on the land may have a significant effect on world climate

The Human Crop
All animals are ultimately nourished by plants. Therefore the abundance of plants regulates the quantity of animals. How many acres of vegetation does it take to raise a man?

The End of the Moas
A swamp filled with bones indicates that these enormous wingless birds lived in New Zealand when knighthood flowered in Europe. Then they vanished. Were they exterminated by aboriginal man?

Radiocarbon Dating
The exciting new method of measuring the age of organic materials is not entirely without difficulties, but the process of investigating them is enriching the whole study of human and geological history

Life in the Depths of a Pond
The quiet waters of a small lake are an active universe of living things. On or near the bottom are tiny animals that are related to the whole yet unique in their adaptation to special conditions

The Probability of Death
It varies considerably with age and species. Man, however, has manipulated his curve of survival so it rather resembles that of the starved fruit fly