through decades of research, it has become clear that human civilization, roughly 6,000 years old, developed during an unusually stable period for global sea levels.
through decades of research, it has become clear that human civilization, roughly 6,000 years old, developed during an unusually stable period for global sea levels.
human:79
human
[citation needed] by the beginning of the upper paleolithic period (50,000 bp), and likely significantly earlier by 100-70,000 years ago or possibly by about 300,000 years ago behavioral modernity, including language, music and other cultural universals had developed.