A new study reveals how, by cultivating fertile soil for farming, ancient Amazonians locked away thousands of tons of carbon that have stayed in the ground for centuries.
ArcGIS software was used to analyze the spatial distribution of Mid Holocene (i.e., 6.7-3.1 ka BP) human settlements and sites in the Dalian area. Their evolution was studied in depth alongside the Mid Holocene environmental background known to have existed. The results showed that: ① The number of ancient settlements in the Dalian area increased during this period. Most sites during the three periods studied were to be found 0 to 50 m above sea level (asl), with a significant increase in the number of sites located > 50 m asl during the Bronze Age. In terms of gradient of slope, all settlements were concentrated on coastal plains or in low-altitude, hilly areas on relatively gentle slopes ranging between 0 and 6 °. Settlements from each period faced in all directions, and were mainly located in river valleys or low-altitude mountain valleys with low terrains.② The proximity of ancient settlements to river courses during the Mid Holocene evolved, with Mid and Late Neolithic
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