<span>They look at the light from the star using a spectrometer. The composition of the light tells them what elements are present in that star</span>
The Stone Age equivalent of a food processor could have triggered the most momentous changes in human evolution, allowing a plant-eating ape with a big jaw and small brain to become a large-brained, small-faced human capable to intelligent thought and speech, scientists have suggested.
According to my research there were three types of ancient people that lived and/or controlled what now is Colombia... The three types are MUISCA (encountered by the Spanish empire in 1537)... QUIMBAYA (controlled that land around the first century BCE)... and finally TAIRONA (first century CE)