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.
Modern Humans, Homo Sapiens Sapiens, have been on the earth at least 200,000 years...This has been confirmed by DNA research...The first Human migrations out of Africa started â¦ around 100,000 years ago.ow long ago did the first human walk on earth? According to the latest discoveries and theories, the genus Homo first came on the scene 2.3 to 2.4 million years ago, while the species Homo sapiens came into being 250,000 t â¦ o 400,000 years ago.