How old have humans existed

    • [DOC File]LESSON: Supporting Observations for the Theory of Evolution

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      Many different organisms have similar proteins and enzymes. The closer the relationships among organisms, the greater their biochemical similarity, thus suggesting evolutionary relationships. (ex.- protein Cytochrome C , amino acid chain is the same in humans and apes, Insulin from pigs and sheep is used in humans, snake bites and horse blood).

    • [DOC File]Third Grade Overview

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      One of the earliest species of Australopithecus, africanus shares characteristics of both apes and humans. It existed from 3-2 million years ago and its fossils have been found exclusively in Africa. Skull replica from the University of Michigan Museum of Natural History. Photo by Teplyn Fournier.

    • [DOCX File]Southeastern Louisiana University

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       of Christopher Stringer and Peter Andrews proposes that modern humans evolved from archaic humans 200,000-150,000 years ago only in Africa and then some of them migrated into the rest of the Old World replacing all of the Neandertals and other late archaic humans beginning around 60,000-40,000 years ago.

    • [DOCX File]University of California, Irvine

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      After the discovery of Lucy, many other anthropologists have searched for human remains in Africa. In the 1990s, another American named Tim White found fossils even older than Lucy – the remains of humans that were 4.4 million years old. These, too, were found in Ethiopia.

    • [DOC File]EARLY PRIMATES

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      Neandertals were formidable hunters, and are the first people known to have buried their dead, with the oldest known burial site being about 100,000 years old. Homo sapiens sapiens (modern) ~120,000 years ago. Modern forms of Homo sapiens first appear about 120,000 years ago. Modern humans have an average brain size of about 1350 cc.

    • [DOCX File]My Maths

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      around 1.5 million. Modern humans have existed for about 200000 years. With cultural evolution, humans continue to acquire knowledge, enabling us to exert more control over our environment than any other species ever has, but we have probably done more damage also. What does this mean for the future of

    • [DOC File]01 - DeKalb County School District

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      4. The ancestors of _____ may have co-existed with dinosaurs, but actual primates did not exist until after the dinosaurs. 5. What type of animal do scientists think is the closest living relative of humans? 6. Humans are in a family called _____ that includes only humans and their humanlike ancestors. 7.

    • [DOC File]Human evolution (wikipedia)

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      Modern humans are known to have overlapped with Neanderthals in Europe for more than 10,000 years, and the discovery raises the possibility that Neanderthals, modern humans and the Denisova hominin may have co-existed.

    • [DOCX File]Chapter 16 - Evidence of Evolution

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      When Darwin left, the world was thought to be about 6000 years old and that humans had essentially existed since the beginning. Darwin’s contemporary Lyell suggested the Earth was millions of years old based on geological processes. We now know the Earth to be closer to four and a half billion years old.

    • [DOC File]Human History Reading Guide

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      Only one species of hominid exists today—Homo sapiens, modern humans. However, a diversity of hominids lived in the past, including the probable ancestors of H. sapiens. The earliest hominid may have lived as long as 6 or 7 million years ago.

    • [DOCX File]Fossils - Student Org | Vanderbilt University

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      Have you been thinking about how long humans have existed? Humans only existed in the . very last knot. of the rope. (See the dangling skeleton!) ... The oldest fossil found is dated at 2.2 billion years old – but we know that the earth is close to 4.6 billion years old, so we don’t have fossils spanning earth’s entire history. C. Looking ...

    • [DOC File]History Social Science Content Standards - Curriculum ...

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      Describe the cooperation that existed between the colonists and Indians during the 1600s and 1700s (e.g., in agriculture, the fur trade, military alliances, treaties, cultural interchanges). ... Identify the locations of human communities that populated the major regions of the world and describe how humans adapted to a variety of environments.

    • [DOCX File]bths.enschool.org

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      Humans have existed for only a tiny fraction of Earth’s history. Scientists believe Earth itself is approximately 4.55 billion years old. The oldest known fossils are about 3.5 billion years old, although some scientists have discovered evidence that life may have begun nearly 4 billion years ago. Dinosaurs walked Earth between 230 and 65 ...

    • [DOC File]UC Observatories

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      In the case of events that happened before humans existed, we have to look at evidence in the Earth's geological record. An example is the iridium layer that suggests a massive explosion the spread ejecta around the globe.

    • [DOC File]s Credo of Geologic and Biological “Change over Time

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      16. How long have humans been on earth? (This answer depends on what you said a human was.) What makes you think that? 17. What evidence do scientist have that modern humans evolved from ape-like primates? Did humans evolve from monkeys or apes? (Trick culture question…) 18. Has there only been one kind of hominid/human species existing at a ...

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