New Scientific Model Suggests, Ancient Human Migration, Was Driven by Climate Change.br Business Insider reports that a new scientific model br suggests that human migration over the last 2 million br years was driven by changes in Earth's climate. .br According to the model published in the journal br 'Nature,' the Earth's shifting climate helped br to shape the way that ancient humans lived. .br According to the model published in the journal br 'Nature,' the Earth's shifting climate helped br to shape the way that ancient humans lived. .br The detailed simulation of the planet'sbr climate history was modeled using br South Korea's powerful supercomputer, Aleph. .br The simulation stretches back to the br Pleistocene epoch and looks at 41,000-year br cyclical patterns in the planet's climate. .br The model reportedly incorporates br climatic changes that occur in response br to minor variations in Earth's orbit.br Business Insider reports that it took over six months for Aleph to make the necessary calculations to create the most comprehensive climate model simulation to date.br The team of researchers mapped the locations of over 3,200 archaeological discoveries of ancient fossils and artifacts left by human ancestors. .br Even though different groups of archaic br humans preferred different climatic br environments, their habitats all responded br to climate shifts caused by astronomical br changes in Earth's axis wobble, tilt, and br orbital eccentricity with timescales br ranging from 21,000 to 400,000 years. , Axel Timmermann, climate physicist at Pusan National University in South Korea, via Business Insider.br The simulation suggests that modern-day human br species may have emerged following a period br of drought in southern Africa and Eurasia. .br This dry period may have forced br our ancient ancestors to adapt br an estimated 300,000 years ago.