Human and life

About Your Privacy on this Site Welcome!

Human and life

Scientific evidence shows that the physical and behavioral traits shared by all people originated from apelike ancestors and evolved over a period of approximately six million years.

One of the earliest defining human traits, bipedalism -- the ability to walk on two legs -- evolved over 4 million years ago. Other important human characteristics -- such as a large and complex brain, the ability to make and use tools, and the capacity for language Human and life developed more recently.

Many advanced traits -- including complex symbolic expression, art, and elaborate cultural diversity -- emerged mainly during the pastyears. Physical and genetic similarities show that the modern human speciesHomo sapiens, has a very close relationship to another group of primate species, the apes.

Humans first evolved in Africa, and much of human evolution occurred on that continent. The fossils of early humans who lived between 6 and 2 million years ago come entirely from Africa.

Most scientists currently recognize some 15 to 20 different species of early humans. Scientists do not all agree, however, about how these species are related or which ones simply died out. Many early human species -- certainly the majority of them — left no living descendants.

Scientists also debate over how to identify and classify particular species of early humans, and about what factors influenced the evolution and extinction of each species. Early humans first migrated out of Africa into Asia probably between 2 million and 1.

They entered Europe somewhat later, between 1. Species of modern humans populated many parts of the world much later. For instance, people first came to Australia probably within the past 60, years and to the Americas within the past 30, years or so.

The beginnings of agriculture and the rise of the first civilizations occurred within the past 12, years. Paleoanthropology Paleoanthropology is the scientific study of human evolution. Paleoanthropology is a subfield of anthropology, the study of human culture, society, and biology.

Human and life

The field involves an understanding of the similarities and differences between humans and other species in their genes, body form, physiology, and behavior. Paleoanthropologists search for the roots of human physical traits and behavior.

They seek to discover how evolution has shaped the potentials, tendencies, and limitations of all people. For many people, paleoanthropology is an exciting scientific field because it investigates the origin, over millions of years, of the universal and defining traits of our species.

However, some people find the concept of human evolution troubling because it can seem not to fit with religious and other traditional beliefs about how people, other living things, and the world came to be. Nevertheless, many people have come to reconcile their beliefs with the scientific evidence.

Early human fossils and archeological remains offer the most important clues about this ancient past. These remains include bones, tools and any other evidence such as footprints, evidence of hearths, or butchery marks on animal bones left by earlier people.

Usually, the remains were buried and preserved naturally. They are then found either on the surface exposed by rain, rivers, and wind erosion or by digging in the ground. By studying fossilized bones, scientists learn about the physical appearance of earlier humans and how it changed.

Human and life

Bone size, shape, and markings left by muscles tell us how those predecessors moved around, held tools, and how the size of their brains changed over a long time. Archeological evidence refers to the things earlier people made and the places where scientists find them.

By studying this type of evidence, archeologists can understand how early humans made and used tools and lived in their environments.

The process of evolution The process of evolution involves a series of natural changes that cause species populations of different organisms to arise, adapt to the environment, and become extinct.The human life cycle starts at fertilization, goes through the embryonic stage and the fetal stage.

After fetal growth and birth, the second stage is infancy, which is the period between birth and one year. Human Life International is recognized by the IRS as a (c)(3) charitable organization. Gifts to HLI are tax deductible as allowed by the law. Although HLI is a Catholic apostolate, HLI is not funded by the Vatican or any Catholic Church entity, nor does HLI receive any government funding.

The Smithsonian’s National Museum of Natural History Human Origins website is dedicated to bringing you the excitement, latest findings, and profound implications of the scientific exploration of human .

Explore human development data from around the world using the interactive tools below. Data presented here were used in the preparation of the Statistical Update, released on .

10 Signs You Know What Matters. Values are what bring distinction to your life. You don't find them, you choose them. And when you do, you're on the path to fulfillment. Jul 21,  · Taken from Rag'n'Bone Man's debut album 'Human', out now: urbanagricultureinitiative.com?IQid=yt Rag'n'Bone Man - Human (Official Video) D.

Human - Wikipedia