ECON 3650 Study Guide - Final Guide: Consumer Choice, Perfect Competition, Common Era
Document Summary
Lecture 2 government involvement in public policies. About 200,000 years ago our ancestors, homo sapiens, appeared in ethiopia, and began to emigrate out of africa to europe and asia. 1 about 50,000 years ago they had reached. Australia by boat, 33,000 years ago the western pacific islands, 15,000 years ago the. Americas, 4,500 years ago the arctic 2,000 years ago deep pacific islands, and finally 1,200 years ago they reached new zealand. Homo sapiens were hunter-gatherers during the paleolithic period, the period of primitive stone tools from about 2. 5 million years ago to 10,000 bce. They had invented the spear-thrower, after about 41,000 years, by. 21,000 bce which added length and leverage to a throwing arm. Major advances in human development occurred with the discovery of metal and invention of alloys. People made jewelry from naturally occurring nuggets of gold and copper in. Later in 6500 bce they knew how to extract copper from mineral ores by smelting.