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.
Human evolution. Human evolution, also known as hominization, is the evolutionary process that led to the emergence of anatomically modern humans, beginning with the evolutionary history of primates â in particular genus Homo â and leading to the emergence of Homo sapiens as a distinct species of the hominid family, the great apes.