posted on Dec, 21 2004 @ 10:22 AM
2 million years ago the australpithecines were running around, and possibly the kenyathropines. Homo habilis
existed around 2 million years
ago also. Archaic Homo sapiens
first appear around 500,000 years ago. Homo antecessor existed 780,000 years ago, but its might not be a
valid taxon. I suppose it would collapse into sapiens
? 'Modern' humans, Homo sapiens sapiens
first show up 120,000 years ago.
I think it is possible and probable since there used to be at least 12 species of hominids
But these other species weren't particualarly capable of using tools. habilis
is the first thought to use actual tools, and erectus
the first thought to get something like fire under control and, because of the warmth it provided, spread out of africa to the rest of the planet. I
don't know about them forming technological (even bronze age technology) civilizations. They don't seem to have even gathered in exceedingly
primitive settlements, let alone cities.