brain size: 1350 cubic centimeters
intelligence: made new kinds of tools, made boats, had vocal language
largest group size: 150-200
other: Homo sapiens sapiens, modern humans, are just that, you and me. And there is something about us that makes us different from everything else on earth. This thing has given us the power to build houses, cities, and now computers. We know this is connected to our brain, but other than that, it is still enveloped in mystery.
Timeline
Ardipithecus | Australopithecus | Homo habilis | Homo erectus | Neandertals | Modern Humans