There a lot of different stories people come up with to respond to this question. From the religion point of view, many religionists believe Adam and Eve were placed upon the earth at just about 5,000 B.C. From the scientific outlook, humans evolved from a common ancestor around 16 million years ago.
6 months ago
Last edited at 3:27AM on 9/20/2013
Well, "land" is a poor choice of words but that depends on your scientific perspective on the evolution history of human but the modern human(Homo sapiens) is evolved between 400.000 and 250.000 years ago. And it took its last shape, the way human looks today, at about 200.000 years ago.