(Old Stone Age) a long period of human development before the development of agriculture

having no fixed home, moving from place to place in search of food, water, or grazing land

Practical use of scientific information to improve the quality of human life: see also applied science

any period of time during which glaciers covered a large part of the earth's surface

to tame; to bring plants or animals under human control

"New Stone Age"; About 10,000 years ago marked by advances in the production of stone tools. Shift from hunting and gathering to agriculture

the organized growing of food on a regular schedule