Welcome to Sustainability Science Centre:
Addressing the challenges of the 21st century
The Sustainability Science Centre is your gateway to research, education and activities in sustainability at University of Copenhagen. The centre encourages cross-disciplinary research collaboration, promotes partnerships between researchers and businesses and offers support for decision makers. Only through a joint effort across scientific fields can we address the challenges facing humankind.
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There is archaeological evidence of modern humans in the Americas by approx. 15 thousand years ago (KYA). However, there is still debate over exactly when and how many times the ancestors of present-day Native Americans entered the New World from Siberia. A large genome-scale study conducted by an international team headed by the Centre for GeoGenetics at the University of Copenhagen has now provided answers to these questions. The study reveals that the ancestors of all present-day Native Americans arrived in the Americas as part of a single migration wave, no earlier than 23 KYA. Within the Americas, the ancestral Native American pool diversified into two basal branches around 13 KYA. The team also reports a later gene flow into some Native Americans from groups related to present-day East Asians and Australo-Melanesians. Finally, the results from this study show no support for certain historical Central and South American groups with distinctive cranial morphology being relicts of an early and separate migration into the Americas, as proposed by the ‘Paleoamerican Model’. The results have just been published online in the leading scientific journal Science.
Large volcanic eruptions release huge clouds of ash and acid into the atmosphere. These clouds spread across the globe and block out the Sun, resulting in a colder climate for decades afterwards. Climate researchers have known