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 … 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 … o 400,000 years ago.