megaliths

huge stone monument

agriculture

farming

domestication

the process of changing plants or animals to make them more useful to humans

Neolithic Era

the New Stone age ; when people learned to make fire and tools like saws and drills

Mesolithic Era

the Middle part of the Stone age; marked by the certain of smaller and more complex tools

land bridges

a strip of land connecting two continents

ice ages

long periods of freezing weather

migrate

to move to a new place

hunter- gatherers

people who hunt animals and gather wild plants, seeds, fruit, and nuts to survive

society

a community of people who share a common culture

Paleolithic Era

the first part of the stone age; when people first used stone tools

tool

an object that has been modified to help a person accomplish a task

ancestor

relative who lived in the past

hominid

an early ancestor of humans

prehistory

the time before there was writing