6 How do atoms absorb & emit light? â¢ Key idea: Energy â¢ A photon carries energyâ¢ Electron in orbit has energy because it is moving and it is pulled by nucleus. â¢ When atom absorbs photon, energy of photon promotes electron to higher energy.
Until now, researchers believed that homo sapiens, the direct descendants of modern man, evolved in Africa about 200,000 years ago and gradually migrated north, through the Middle East, to Europe and Asia.
Modern humans are of the species Homo sapiens. There is evidence that modern humans evolved from various human ancestors like those within the Ardipithecus Group, Australopithecus Group, and the Paranthropus Group. However, the most closely related human ancestors are found in the Homo Group.Homo habilis skull.he most primitive of the Homo group is the species Homo habilis. Homo habilis lived from 2.4 million to 1.4 million years ago. This species started to resemble modern humans more with a larger brain, smaller face, and smaller teeth.