6 EARLY HUMANS WHAT MAKES HUMANS DIFFERENT FROM OTHER SPECIES?

Transcription

1 6 EARLY HUMANS WHAT MAKES HUMANS DIFFERENT FROM OTHER SPECIES?

2 UNIT 6 EARLY HUMANS CONTENTS UNIT 6 BASICS 3 Unit 6 Overview 4 Unit 6 Learning Outcomes 5 Unit 6 Lessons 6 Unit 6 Key Concepts LOOKING BACK 8 What Happened in Unit 5? KEY CONTENT 10 Threshold 6: Humans and Collective Learning 11 Threshold 6: Collective Learning 13 Lucy and the Leakeys; Jane Goodall 14 Introduction to Anthropology 15 Introduction to Archaeology 16 Collective Learning (Part 1) 17 Common Man 18 Early Collective Learning 19 How Did the First Humans Live? 20 Foraging 21 From Foraging to Food Shopping 22 Genealogy and Human Ancestry LOOKING AHEAD 24 What s Next in Unit 7? 2

3 UNIT 6 OVERVIEW Key Disciplines: Anthropology and archaeology Timespan: The first modern humans are thought to have evolved at least 200,000 years ago Driving Question: What makes humans different from other species? Threshold for this Unit: Threshold 6: Collective Learning 3

4 UNIT 6 LEARNING OUTCOMES By the end of Unit 6, students should be able to: 1. Describe human evolution, using evidence and connection to other species of mammals. 2. Explain whether or not symbolic language makes humans different. 3. Describe how early humans lived. 4. Explain collective learning. 5. Understand what scholars from multiple disciplines know about a topic and the questions they can ask to gain an understanding of the topic from an integrated perspective. 4

5 UNIT 6 LESSONS 6.0 How Our Ancestors Evolved We might share a lot with our primate cousins, but our bigger brains, our ability to walk upright, and other physical improvements, are all adaptations that make humans unique. 6.1 Ways of Knowing: Early Humans Because our earliest ancestors did not write, to study them requires the contributions from scholars in many disciplines. The study of human remains and human artifacts provide important clues to these scholars about the evolution of early humans and how they lived. 6.2 Collective Learning You may think you can talk to the animals, but our ability to use language separates us from other species. Without it, we wouldn t have the ability for collective learning, which allows us to dominate the biosphere. 6.3 How Did the First Humans Live? Our Paleolithic ancestors were foraging nomads who eventually migrated across six continents. These early humans made tools, used fire, and sustained themselves in diverse environmental conditions. 5

6 UNIT 6 KEY CONCEPTS anthropology archaeology australopithecines bipedalism collective learning culture foraging fossils genealogy genetics hominines Homo ergaster or Homo erectus Homo habilis Homo sapiens marsupials migration Neanderthal nomadic Paleolithic era paleontology primate symbiosis symbolic language taxonomy 6

7 LOOKING BACK

8 WHAT HAPPENED IN UNIT 5? Unit 5 focused on the emergence of living things on Earth. During the first 10 billion years in the history of the Universe, there were no living things. We learned: About the conditions required for the emergence of life. What similarities exist across all living things. How life has changed over time, evolving from simple life forms to complex organisms. How life is affected by changes in astronomical, geological, and biological conditions. How DNA enables living things to pass adaptations to new generations. 8

9 KEY CONTENT

10 THRESHOLD 6: HUMANS AND COLLECTIVE LEARNING Video Humans are a unique species in the animal world because they have the ability for collective learning. In most species, individuals acquire knowledge over a lifetime, but this knowledge is lost when the individual dies. This is not the case with humans, who have language and can pass on knowledge from individual to individual and generation to generation. Humans are primates, a special type of mammal. Primates began to evolve at the time that dinosaurs became extinct. Homo sapiens, or modern humans, appeared only recently, about 200,000 years ago. The ingredients and Goldilocks Conditions necessary for collective learning are powerful brains and precise and versatile symbolic language. The Goldilocks Conditions are the interactions between individuals and between communities that enable the transfer and storage of information. Collective learning allowed humans to innovate and learn to a degree not possible before, and it allowed humans to share, preserve, and build upon the knowledge of an individual rather than losing that knowledge when the individual died. 10

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13 LUCY AND THE LEAKEYS/ JANE GOODALL Articles / Cynthia Stokes Brown Anthropologists have discovered important evidence to show how humans differ from their cousins, the primates. Louis and Mary Leakey worked for many years in East Africa, in Olduvai Gorge in the Great Rift Valley, studying the evolution of early humans. In 1976, Mary Leakey discovered a set of footprints made by a group of early humans about 3.6 million years ago, which showed that early humans could walk upright on two legs. Louis Leakey showed that humans were making tools about 2.5 million years ago. In 1974, Don Johanson found about 20 percent of a female hominine skeleton that dated to roughly 3.2 million years ago. There were enough pelvis and leg bones discovered to confirm that Lucy walked upright. Jane Goodall was sent by Louis Leakey to Africa to study chimp populations, in order to better understand how humans relate to their closest relatives in the animal world. Living among the chimps for the better part of her life, Goodall discovered that chimps use tools, make war, and have complex social relationships in their chimp communities. These discoveries transformed human understanding of chimp behavior. 13

14 INTRO TO ANTHROPOLOGY Guest Talk / Kathy Schick Kathy Schick is a professor of anthropology at Indiana University. Anthropology is the holistic study of humankind; the study of how, when, and why humans and different cultures develop and live. Anthropologists work to fill in gaps in our knowledge about humans by finding missing links in the human story. This can be done by studying humans in a number of different ways: by focusing on culture, by focusing on physical traits and adaptations, by focusing on language, or by focusing on prehistory. There are different types of anthropologists. Two types are particularly interested in the story of early humans. Physical anthropologists study fossil evidence to learn about our direct ancestors but also our cousins, closely-related species. Paleoanthropologists focus on human evolution. 14

15 INTRO TO ARCHAEOLOGY Video Talk / Nicholas Toth Nicholas Toth is a professor of archaeology at Indiana University. Archaeology is the study of ancient people and the world they lived in. Archaeologists gather evidence about ancient peoples by identifying sites where they lived, by exploring and surveying these sites, by digging for artifacts at these sites, and then by analyzing the sites and artifacts from them. Archaeology has both a field component, where the evidence is gathered, and a lab component, where the evidence is analyzed. There are different types of archaeology. Historical archaeologists study people who left behind written records. Prehistoric archaeologists study people who lived before the invention of writing and have only left artifacts behind. A third type, experimental archaeologists, try to re-create how people made things like tools. Archaeologists ask important questions about the past. What is driving human evolution? What accounts for the changes in how humans lived, which we see in the archaeological record? 15

16 COLLECTIVE LEARNING (PART 1) Article / David Christian Human culture isn t the product of individual geniuses; rather, our culture has been slowly built over time by millions of people. Collective learning depends on the ability to access and share information. Humans are able to pass on their discoveries and innovations because of the power of language. Collective learning gives humans infinite capacity for memory and allows us to work in teams. Archaeologists look for evidence of collective learning, such as evidence of tool-making in early humans. 16

17 COMMON MAN Video What makes humans different from other species? Big History teaches that humans share a common history, and it also teaches that they share collective learning on a global scale. Language gives humans the ability to convey ideas efficiently and precisely to others. Knowledge is accumulated and builds from generation to generation. This ability to preserve and pass on information makes humans different from other species. Collective learning is a behavior that gives human tremendous power. As a result humans have been able to migrate into all areas of the Earth and even explore space. Despite the dominance of humans in the biosphere, there exists an incredibly complex web of cooperation between humans, domesticated animals, and plants, with humans at the center of this relationship but with both animals and plants benefiting. Despite the record of warfare throughout history, humans are better cooperators than other species. Humans have demonstrated an incredible curiosity to know for knowledge s sake, not just to meet basic or immediate needs. 17

18 EARLY COLLECTIVE LEARNING Video Talk / John Shea John Shea is a professor of anthropology at Stony Brook University. Humans and primates share many characteristics including the forming of social groups, hierarchical relationships, and family units. However, there are important things that make us different. Some of the behaviors that distinguish humans from their primate relatives are the fact that humans do things differently from each other (variability in behavior) and our ability to record, preserve, and share information through symbolic language (which forms the basis of collective learning). Speech, or symbolic language, is critical to our ability to share information because it allows humans to share and to pass on both simple and complex information from one generation to the next. Humans are the only species that have this ability. The study of the origins of language is a truly interdisciplinary quest because scientists and historians must work together to formulate theories as to how and why humans began to speak. 18

19 HOW DID THE FIRST HUMANS LIVE? Video Talk / David Christian The earliest humans lived in the Paleolithic era. The word root paleo means old, and lithos means stone, so the name literally means old stone age. This name was chosen because stone tools were the first type of tools that early humans used. Humans were foragers during the Paleolithic era, gathering local plants and hunting or scavenging for animals. Humans were also nomads during this time, moving from place to place over a large area to access these plants and animals. Evidence suggests that early humans tended to live in small groups of people and believed in a world inhabited by spirits. 19

20 FORAGING Article / Cynthia Stokes Brown Humans and their ancestors have existed for approximately 7 million years, but our species only began farming 10,000 years ago, which means that humans have spent most of their time on Earth as foragers. Some human societies have maintained the foraging lifestyle into recent times, including the Bushmen of Botswana, the Aborigines of Australia, and the Yanomami of the Brazilian rainforest. However, pressure from modern agricultural and industrial societies has forced many of these groups to modify their traditional practices. Anthropologists continue to study modern foraging peoples. They continue to debate gender roles in foraging societies, the physical and mental health of foragers, and the impact of foragers on their environment. 20

21 FROM FORAGING TO FOOD SHOPPING Video Talk / Nicole Waugaesek What drives human decisions about what to eat has not changed a great deal over time. Foragers had to make decisions about what they would eat just as we do today. Foods with lots of calories, that come in large packages, and that are easy to prepare would have been preferable. Big animals, tubers (like potatoes), and large fruits would have been attractive food options for early foragers. Foods like bone marrow, nuts, and honey would have been more challenging to get, but they tasted good. Fatty foods and sweets were exceedingly rare in forager s environment, so when they found them, they probably took advantage of the opportunity. History has shown a clear pattern of humans moving into an area and causing the extinction of important animals and plants. This happened because humans would typically go after their top food choices as soon as they arrived in a new area. 21

22 GENEALOGY AND HUMAN ANCESTRY Video Talk / Henry Louis Gates, Jr. Henry Louis Gates, Jr., is a professor of African and African-American Studies at Harvard University Genetics is an important resource for the study of early humans because genetic tests can reveal important information about individuals, their families, and their relationships, which provide important insights into the history of the human species. Genetic studies have been particularly helpful in clarifying the history of early humans. Genetics can provide important information about migration by showing when mutations appear in certain populations. This evidence makes clear that humans evolved in East Africa, and modern humans spread from there to other parts of the world over the course of about 50,000 years. 22

23 LOOKING AHEAD

24 WHAT S NEXT? In Unit 7, we will focus on the origin and development of agriculture and its impact on the way humans lived. We will learn: How the development of agriculture changed the way humans lived. How cities, states, and civilizations developed to organize agricultural societies. About the development of writing and the impact that had on the evidence available to modernday historians. 24