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.
FIRST MODERN HUMANS. Homo sapiens sapiens (modern humans) first evolved between 200,000 BC and 100,000 BC. They were like us, physically, and had the same brain power.They developed many skills of survival, and advanced FLINT-KNAPPING techniques for making better tools.IRST MODERN HUMANS. Homo sapiens sapiens (modern humans) first evolved between 200,000 BC and 100,000 BC. They were like us, physically, and had the same brain power.