2. Infancy Human Lifespan Childhood Adulthood Old age Youth Preteen Adolescence Older adult Adult Young adult The Great Depression Exploration and Colonization Early US Middle US American History Modern US British colonization Spanish, Dutch, French colonization Revolutionary Years The Growing Years Civil War Gilded Age Pre-depression WWII Cold War Information Age Recorded History Ancient History Middle Ages Modern Early Modern Age of discovery And exploration Fall of Rome Roman Empire Roman Republic Etruscan Iron Age Bronze Age Copper Age Dark Ages Early Middle Ages High Middle Ages Late Middle Ages Hundred Years War Human Evolution Homo sapiens Homo erectus Homo habilis Australopithecines Split from chimps Cenozoic Tertiary Quaternary Holocene Pleistocene Pilocene Miocene Oligocene Eocene Paleocene Exploration and Colonization Early US Middle US American History Modern US British colonization Spanish, Dutch, French colonization Revolutionary Years The Growing Years Civil War Gilded Age Pre-depression WWII Cold War Information Age Recorded History Ancient History Middle Ages Modern Early Modern Age of discovery And exploration Fall of Rome Roman Empire Roman Republic Etruscan Iron Age Bronze Age Copper Age Dark Ages Early Middle Ages High Middle Ages Homo sapiens Homo erectus Homo habilis Australopithecines Split from chimps Human Evolution Cenozoic Tertiary Quaternary Holocene Pleistocene Pilocene Miocene Oligocene Eocene Paleocene Human Lifespan Childhood Adulthood Old age Youth Preteen Adolescence Older adult Adult Young adult Infancy Exploration and Colonization Early US Middle US American History Modern US British colonization Spanish, Dutch, French colonization Revolutionary Years The Growing Years Civil War Gilded Age Pre-depression WWII Cold War Information Age Exploration and Colonization Early US Middle US American History Modern US British colonization Spanish, Dutch, French colonization Revolutionary Years The Growing Years Civil War Gilded Age Pre-depression WWII Cold War Information Age

3. Infancy Human Lifespan Childhood Adulthood Old age Youth Preteen Adolescence Older adult Adult Young adult The Great Depression Exploration and Colonization Early US Middle US American History Modern US British colonization Spanish, Dutch, French colonization Revolutionary Years The Growing Years Civil War Gilded Age Pre-depression WWII Cold War Information Age Recorded History Ancient History Middle Ages Modern Early Modern Age of discovery And exploration Fall of Rome Roman Empire Roman Republic Etruscan Iron Age Bronze Age Copper Age Dark Ages Early Middle Ages High Middle Ages Late Middle Ages Hundred Years War Human Evolution Homo sapiens Homo erectus Homo habilis Australopithecines Split from chimps Cenozoic Tertiary Quaternary Holocene Pleistocene Pilocene Miocene Oligocene Eocene Paleocene Exploration and Colonization Early US Middle US American History Modern US British colonization Spanish, Dutch, French colonization Revolutionary Years The Growing Years Civil War Gilded Age Pre-depression WWII Cold War Information Age Recorded History Ancient History Middle Ages Modern Early Modern Age of discovery And exploration Fall of Rome Roman Empire Roman Republic Etruscan Iron Age Bronze Age Copper Age Dark Ages Early Middle Ages High Middle Ages Homo sapiens Homo erectus Homo habilis Australopithecines Split from chimps Human Evolution Cenozoic Tertiary Quaternary Holocene Pleistocene Pilocene Miocene Oligocene Eocene Paleocene Human Lifespan Childhood Adulthood Old age Youth Preteen Adolescence Older adult Adult Young adult Infancy Recorded History Ancient History Middle Ages Modern Early Modern Age of discovery And exploration Fall of Rome Roman Empire Roman Republic Etruscan Iron Age Bronze Age Copper Age Dark Ages Early Middle Ages High Middle Ages Recorded History Ancient History Middle Ages Modern Early Modern Age of discovery And exploration Fall of Rome Roman Empire Roman Republic Etruscan Iron Age Bronze Age Copper Age Dark Ages Early Middle Ages High Middle Ages

4. Infancy Human Lifespan Childhood Adulthood Old age Youth Preteen Adolescence Older adult Adult Young adult The Great Depression Exploration and Colonization Early US Middle US American History Modern US British colonization Spanish, Dutch, French colonization Revolutionary Years The Growing Years Civil War Gilded Age Pre-depression WWII Cold War Information Age Recorded History Ancient History Middle Ages Modern Early Modern Age of discovery And exploration Fall of Rome Roman Empire Roman Republic Etruscan Iron Age Bronze Age Copper Age Dark Ages Early Middle Ages High Middle Ages Late Middle Ages Hundred Years War Human Evolution Homo sapiens Homo erectus Homo habilis Australopithecines Split from chimps Cenozoic Tertiary Quaternary Holocene Pleistocene Pilocene Miocene Oligocene Eocene Paleocene Exploration and Colonization Early US Middle US American History Modern US British colonization Spanish, Dutch, French colonization Revolutionary Years The Growing Years Civil War Gilded Age Pre-depression WWII Cold War Information Age Recorded History Ancient History Middle Ages Modern Early Modern Age of discovery And exploration Fall of Rome Roman Empire Roman Republic Etruscan Iron Age Bronze Age Copper Age Dark Ages Early Middle Ages High Middle Ages Homo sapiens Homo erectus Homo habilis Australopithecines Split from chimps Human Evolution Cenozoic Tertiary Quaternary Holocene Pleistocene Pilocene Miocene Oligocene Eocene Paleocene Human Lifespan Childhood Adulthood Old age Youth Preteen Adolescence Older adult Adult Young adult Infancy Human Evolution Homo sapiens Homo erectus Homo habilis Australopithecines Split from chimps Human Evolution Homo sapiens Homo erectus Homo habilis Australopithecines Split from chimps

5. Infancy Human Lifespan Childhood Adulthood Old age Youth Preteen Adolescence Older adult Adult Young adult The Great Depression Exploration and Colonization Early US Middle US American History Modern US British colonization Spanish, Dutch, French colonization Revolutionary Years The Growing Years Civil War Gilded Age Pre-depression WWII Cold War Information Age Recorded History Ancient History Middle Ages Modern Early Modern Age of discovery And exploration Fall of Rome Roman Empire Roman Republic Etruscan Iron Age Bronze Age Copper Age Dark Ages Early Middle Ages High Middle Ages Late Middle Ages Hundred Years War Human Evolution Homo sapiens Homo erectus Homo habilis Australopithecines Split from chimps Cenozoic Tertiary Quaternary Holocene Pleistocene Pilocene Miocene Oligocene Eocene Paleocene Exploration and Colonization Early US Middle US American History Modern US British colonization Spanish, Dutch, French colonization Revolutionary Years The Growing Years Civil War Gilded Age Pre-depression WWII Cold War Information Age Recorded History Ancient History Middle Ages Modern Early Modern Age of discovery And exploration Fall of Rome Roman Empire Roman Republic Etruscan Iron Age Bronze Age Copper Age Dark Ages Early Middle Ages High Middle Ages Homo sapiens Homo erectus Homo habilis Australopithecines Split from chimps Human Evolution Cenozoic Tertiary Quaternary Holocene Pleistocene Pilocene Miocene Oligocene Eocene Paleocene Human Lifespan Childhood Adulthood Old age Youth Preteen Adolescence Older adult Adult Young adult Infancy Cenozoic Tertiary Quaternary Holocene Pleistocene Pilocene Miocene Oligocene Eocene Paleocene Cenozoic Tertiary Quaternary Holocene Pleistocene Pilocene Miocene Oligocene Eocene Paleocene

6. Infancy Human Lifespan Childhood Adulthood Old age Youth Preteen Adolescence Older adult Adult Young adult The Great Depression Exploration and Colonization Early US Middle US American History Modern US British colonization Spanish, Dutch, French colonization Revolutionary Years The Growing Years Civil War Gilded Age Pre-depression WWII Cold War Information Age Recorded History Ancient History Middle Ages Modern Early Modern Age of discovery And exploration Fall of Rome Roman Empire Roman Republic Etruscan Iron Age Bronze Age Copper Age Dark Ages Early Middle Ages High Middle Ages Late Middle Ages Hundred Years War Human Evolution Homo sapiens Homo erectus Homo habilis Australopithecines Split from chimps Cenozoic Tertiary Quaternary Holocene Pleistocene Pilocene Miocene Oligocene Eocene Paleocene Exploration and Colonization Early US Middle US American History Modern US British colonization Spanish, Dutch, French colonization Revolutionary Years The Growing Years Civil War Gilded Age Pre-depression WWII Cold War Information Age Recorded History Ancient History Middle Ages Modern Early Modern Age of discovery And exploration Fall of Rome Roman Empire Roman Republic Etruscan Iron Age Bronze Age Copper Age Dark Ages Early Middle Ages High Middle Ages Homo sapiens Homo erectus Homo habilis Australopithecines Split from chimps Human Evolution Cenozoic Tertiary Quaternary Holocene Pleistocene Pilocene Miocene Oligocene Eocene Paleocene Human Lifespan Childhood Adulthood Old age Youth Preteen Adolescence Older adult Adult Young adult Infancy Human Lifespan Childhood Adulthood Old age Youth Preteen Adolescence Older adult Adult Young adult Infancy Human Lifespan Childhood Adulthood Old age Youth Preteen Adolescence Older adult Adult Young adult Infancy