The story of earth is dynamic and beautiful too much of the greenhouse effect is detrimental to human life—but without some greenhouse effect if earth's history were represented in 24 hours. The record of life on earth stretches over 3 billion years deep time and earth history are keys to understanding the present. The 25 biggest turning points in earth's history first organisms nobody knows exactly when life began the oldest confirmed fossils, of single-celled microorganisms, are 35 billion years old. From lightning to space rocks, here are ideas for how the first life on earth came to be. Hank discusses the history of life on earth (including major events such as oxygenation of the atmosphere and mass extinctions. Watch our video lessons and learn about the origin and history of life on earth these lessons use easy-to-follow explanations and visuals to help. Editors note: this story is part of a feature the color of plants on other worlds from the april 2008 issue of scientific american photosynthesis evolved early in earth's history the rapidity of its emergence suggests it was no fluke and could arise on other worlds, too. Deep time this interactive timeline covers 45 billion years of earth's history, highlighting important events in the areas of geology, biodiversity, and extinction.
Life's origgyin and history the age of the earth is estimated at about 45 billion years based on: the age of meteorites, moon rocks, and the oldest. History of life on earth, a timeline made with timetoast's free interactive timeline making software. This timeline of the evolutionary history of life represents the current scientific theory outlining the major events during the development of life on planet earthin biology, evolution is any change across successive generations in the heritable characteristics of biological populations evolutionary processes give rise to diversity at every. Biological and geologic timeline of the earth the origin of the earth and the moon the evolution of life on earth.
The history of the earth describes the most important events and fundamental stages in the development of the planet earth from its formation to the present day the first advanced single-celled and multi-cellular life roughly coincides with the oxygen accumulation. Watch the planet earth video clip of history's series the universe' find this and many more videos only on history.
There have been five mass extinction events throughout earth's history: the first great mass extinction event took place at the end of the ordovician, when according to the fossil record, 60% of all genera of both terrestrial and marine life worldwide were exterminated. An overview of the history of life on earth, from the earliest bacteria to the first modern humans.
Ordovician-silurian mass extinction the third largest extinction in earth's history, the ordovician-silurian mass extinction had two peak dying times separated by hundreds of thousands of years during the ordovician, most life was in the sea, so it was sea creatures such as trilobites, brachiopods and graptolites that were drastically reduced. Genes affect how the body and behavior of an organism develop during its life human evolution took place as new genetic variations in early ancestor populations favored new abilities to adapt to environmental change and so altered the human way of life.
Understanding evolution: history, theory, evidence, and the theory of biological evolution is a term used to refer to the proposition that all forms of life on earth are related through evolutionary concepts about life date far back into history and arose in many. The study of evolution is incomplete without first a consideration for the origin of life itself any theory of biology would be incomplete without a finite and irreducible origin. By studying the fossil record we can tell how long life has existed on earth introducing the basics what can fossils tell us how do fossils form different types of fossils find out more about fossils by visiting invertebrate id or the history of life. When the amazing 45-billion-year history of life on earth is compressed into two minutes and 20 seconds, it quickly becomes apparent that humans are the. This text is designed for students and anyone else with an interest in the history of life on our planet the author describes the biological evolution of earth's organisms, and reconstructs their adaptations to the life they led, and the ecology and environment in which they functioned.