Answer:
The Paleolithic Era, or Old Stone Age, marked the first and longest period of human history. Beginning 4 million years ago and continuing to 10,000 B.C., it saw early hominids living as foragers, consuming whatever food sources were available. Scientists once believed these early human ancestors were mostly vegetarians, eating meat only very rarely. New research, however, complicates that. Although the earliest hominids were primarily herbivores, later groups turned more to fish and animal proteins. This alteration in diet went along with certain evolutionary changes, leading to the rise of modern humans.
Step-by-step explanation: