Heart disease kills about a half-million people every year in the United States. It begins with the clogging of the arteries - which is called atherosclerosis. When there is too much saturated fat and trans fat in the bloodstream, it sticks to the walls, which narrows the passageway that blood must travel through.
The earliest known fossil of a human ancestor, a female Ardipithecus ramidus specimen nicknamed Ardi, is 3.2 million years old. Scientific evidence says that the first modern humans, Homo sapiens, appeared more than 200,000 years ago. Some fossils from the middle Pleistocene period (about 400,000 years ago), referred to as Homo sapiens rhodesiensis, may be archaic Homo sapiens - a transitional species.
Cro-Magnon was one of the first fossils of an ancient human ever discovered. Image courtesy of Wikicommons. Paleoanthropologists agree that modern humans evolved in Africa about 200,000 years ago, yet the fossil evidence for the earliest examples of Homo sapiens is scarce.aleoanthropologists agree that modern humans evolved in Africa about 200,000 years ago, yet the fossil evidence for the earliest examples of Homo sapiens is scarce.