1. The discovery of Peking Man was one of the most decisive steps in the scientific quest to trace man's prehistorical development from apes.
2. Not only is the site an exceptional reminder of the Asian continent's prehistorical human societies, but it also illustrates the process of evolution.
3. They are very precious materials for the research on prehistorical life, said Liu.
adj
1. belonging to or existing in times before recorded history
e.g. prehistoric settlements
prehistoric peoples
Synonym: prehistoric