The earliest known invention of writing happened about 3000 b.c.e.
Historians no longer see writing as a sharp dividing line, as the focus on only the last five thousand years leaves out most of the human story.
They explore all eras of the human past with many different types of sources and push the beginning of history back to the beginning of the universe.
Humans oldest histories are due to the fact that for thousands and perhaps tens of thousands began to portray themselves on the surfaces of places where they of years ago many peoples have narrated histories of their origins that also lived and traveled as early as 50,000 b.c.e.
The rock painting begins with the creation of the universe.
In Africa, you can see a person wearing a large headdress.
They migrated out of Africa in waves, eventually spreading across the earth.
Initially, their tools were just sticks and stones, but later they invented specialized tools that enabled them to make clothing, build shelters, and decorate their surroundings.
The domestication of plants and animals may have been the most significant change in human history because of the environmental changes.
Drawing on a variety of techniques and disciplines, scholars have examined early human evolution, traced the expansion of the human brain, and studied migration out of Africa and across the planet.
Hu mans were able to adapt to many different environments and be flexible in their responses to new challenges because of the larger brain.
In their natural state, members of a species can become very different over time.
The process of shaping the world around humans has always been the result of human action.
The process of natural selection resulted from the increasing dissimilarity in the long era before humans.
Small variations within individuals in one species allowed them to get more food and better living conditions and make them more successful in breeding, thus passing their genetic material to the next generation.
A number of individuals within a species became distinct enough that they could no longer interbreed successfully with each other.
During periods of mass extinctions such as the one that killed the dinosaurs about 65 million years ago, species become extinct.
The biological classification system based on kingdom, order, family, ge nus, and species was developed in the 18th century.
More recently, these classifications have been supported by genetic evidence.
Most scientists believe that humans and Chimpanzees share a common ancestor, as 98 percent of human DNA is the same as Chimpanzees.
Between 5 million and 7 million years ago, that common ancestor lived.
The earliest type of evidence used to learn about the distant which humans used tools of stone, human past, and scholars used them to develop another system of classification, one that bone, and wood and obtained food distinguished between periods of time rather than types of living creatures.
They gave by gathering and hunting.
The eras are based on the materials used to make the tools.
People gain food by gathering plant next to the Iron Age.
By gathering plant products, trapping or catching larger prey.
People around the world adopted agriculture at various times, though some never did, but obtained food by raising crops and animals and continued to use tools the transition between the Paleolithic and the Neolithic is usual.
The last twelve thousand years are referred to as the Chapter Chronology.
Europe and western Asia are not suitable to live in.
Today's lifestyle began in the Neolithic.
Domestication of problematic is also included in this evidence.
Domestication of cattle, plow inferior, and often misinterpreted what they were seeing.
For thousands of years, the wheel has been adapted for use with ing.
Valuable clues are provided by the Earliest known invention.
The scale of time covered in Chapter 1 is large.
The muscular structure of some hominids evolved over time to make walking upright easier.
The researchers at the Native American site in the Boise National Forest in Idaho remove objects from the soil and note their location.
A better understanding of the people who once lived at the site can be achieved by knowing what was growing in the area.
They left bones in the Great Rift Val ey that spans from Ethiopia to Tanzania.
Walking upright allowed australopithecines to carry and use tools, which may have spurred brain development.
The earth's climate was in a warm phase from 1 mil ion to 2 million years ago, and these hominids moved into western Asia as early as 1.8 million years ago.
Simple shelters were built for many who lived in the open or in caves.
The ability to think reflec allowed for the creation of symbolic language, that is, language that follows certain rules and can refer to things that are not necessarily present.
The question of why hominids developed larger brains might be answered by looking at how paleontologists think it happened.
This created what biologists callselective pressure, which meant individuals with bigger brains.
The chal enges of using and inventing better tools created pressure that led to bigger brains.
It could have happened with symbolic language and thought.
A slightly bigger brain, or a brain that grew quickly after birth, allowed for more complex thought and better language skills.
The ability to think and speak enabled individuals to better attract mates and fend off rivals, which meant a greater likelihood of passing on the enhanced brain to the next generation.
Learning language promotes certain areas of the brain.
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