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.
Early Transitional Humans. Humans are members of the genus Homo. Modern people are Homo sapiens. However, we are not the only species of humans who have ever lived. There were earlier species of our genus that are now extinct.In the past, it was incorrectly assumed that human evolution was a relatively straightforward sequence of one species evolving into another.all (100-235 cm) and weighed around 70 pounds (32 kg) The evolution of larger bodies occurred later in human evolution. The differences between australopithecines and early humans are most noticeable in the head.