3a) may not be appropriate for estimating the true dynamics of the current biodiversity crisis. Instead, here we demonstrate the high spatial and temporal heterogeneity of human-driven extinctions (Fig. 3). Nevertheless, extinction debts—the projected extinctions of numerous extant species that are ...
A human activity intrinsically linked to agricultural production is trade. Since the development of agriculture, regional trade routes became established and have been used repeatedly at different times. Highly valuable goods, as well as agricultural products and crops started to be transported between t...