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.
A range of views from WikiAnswers contributors. 1  Judaism and Christianity teach that the first humans were Adam and Eve (Hebrew: Chava). 2  Muslims refer to them as Adam and Hawaa. Muslims refer to them as Adam and Hawaa. 2  Many religions have stories that tell us who the first people in this world were and these usually have a time frame of a few thousand years ago. 3  Archaeologists tell us that people have lived on earth for millions of years.