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Data published by the demographer Carl Haub and Dr. Toshiko Kaneda in How Many People Have Ever Lived on Earth? on the Population Reference Bureau (PRB) website suggests that the 50 billionth person would have been born around 130 AD / CE. This can be seen by looking at the column 'Number Ever Born' in the table below: Image source: Population Reference ...


12

Its actually a pretty astute observation that independent river-valley "cradles of civilization" tend to have their own crops associated with them. I've personally had a lot of luck researching plant domestication and its association with nearby river valleys, even in some unexpected places. The two definitely seem related. However, this isn't a hard and ...


5

We currently don't know what erased the other hominid species and many of the original theories are starting to be proven false. We assumed that Neanderthals were made extinct due to climate change, but that was recently disproven by Universita di Bologna. "The analyses we carried out show little variation in rainfall between 50,000 and 27,000 years ...


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