As human beings, we are part of the whole stream of life. - Rachel Carson

It is only within the moment of time represented by the twentieth century that one species - man - has acquired significant power to alter the nature of his world, and it is only within the past twenty-five years that his power has achieved such magnitude that it endangers the whole earth and its life. The most alarming of all man's assaults upon the environment is the contamination of the air, earth, rivers, and seas with dangerous, and even lethal, materials.

There is symbolic as well as actual beauty in the migration of birds, in the ebb and flow of the tides; in the folded bud ready for the spring. There is something infinitely healing in these repeated refrains of nature-the assurance that dawn comes after night, and spring after winter.

The wide-ranging birds that visit islands of the ocean in migration may also have a good deal to do with the distribution of plants, and perhaps even of some insects and minute land shells. From a ball of mud taken from a bird's plumage, Charles Darwin raised 82 separate plants, belonging to 5 distinct species! Many plant seeds have hooks or prickles, ideal for attachment to feathers. Such birds as the Pacific golden plover, which annually flies from the mainland of Alaska to the Hawaiian Islands and even beyond, probably figure in many riddles of plant distribution.