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.]] ORIGIN system.]] These included one collection approximately 150 million began, and the resulting Solar Wind cleared out most of the material in the disc that had not already condensed into larger bodies. MOON forming in Earth’s L5 point and then, perturbed by gravity, colliding to help form the moon. The animation progresses in one-year steps making Earth appear not to move. The view is of the south pole.]] THE HADEAN See Also: Hadean BEGINNINGS OF LIFE . DNA is far more complex than the original replicator and its replication systems highly elaborate.]] See Also: Origin of life THE FIRST CELL s serve various functions in regulating the passage of material through the membrane and in reacting to the environment.]] PHOTOSYNTHESIS AND OXYGEN ’s energy led to several major changes in life on Earth.]] ENDOSYMBIOSIS AND THE THREE DOMAINS OF LIFE See Also: Endosymbiotic theory s might have arisen.]] MULTICELLULARITY aureus'' is believed to be similar to the first multicellular plants.]] COLONIZATION OF LAND , one of Earth’s neighboring planets.]] , the most recent supercontinent, existed from 300 to 180 million years ago. The outlines of the modern continents and other land masses are indicated on this map.]] HUMANITY africanus'', an early Hominid .]] See Also: Human evolution CIVILIZATION See Also: History of the world of the Indus Valley Civilization , one of the ancient civilizations.]] by Leonardo Da Vinci epitomizes the advances in art and science seen during the Renaissance.]] RECENT EVENTS . For the first time in history, Earth was viewed from the vantage of space.]] Change has continued at a rapid pace in the last millisecond of our notional 24-hour period, from the mid- 1950s to today. There is increasing awareness of the effect humans have on their environment, as well as of the necessary steps to limit or reverse damage; and there is increasing concern about Mass Extinction and Global Warming . Pessimists argue that it is too late to avert ecological catastrophe; optimists argue that the ever more-rapid progress of science and technology will provide solutions. Of all the recent scientific discoveries, of ''Homo sapiens'' himself. SEE ALSO
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