The theory of punctuated equilibrium (PE) was developed a little over 50 years ago to
explain long‐term, large‐scale appearance and disappearance of species in the fossil …

As global warming intensifies and extreme weather events become more frequent, the
severity of drought conditions in China's **njiang region has escalated. This exacerbates …

How did interpersonal violence develop in early human societies? Given that homicide
records are only available for the more recent period, much of human history remains …

Classic Maya populations living in peri-urban states were highly dependent on seasonally
distributed rainfall for reliable surplus crop yields. Despite intense study of the potential …

The relationship between historical climate change and past agricultural production
contributes to a better understanding of the impacts of projected climate change by providing …

Understanding the causes of abrupt hydrologic declines in the Asian summer monsoon
region may help limit the adverse effects of such events on the region's economy and …

Droughts cause significant economic damage worldwide. Evaluating their impacts on crop
yield and water resources can help mitigate these losses. Using single variables such as …

Punctuated equilibria is a theory of evolution that suggests that species go through periods
of stability followed by sudden changes in phenotype. This theory has been debated for …

The study of collapse in archaeology and history has continued to grow and develop in the
last decade and is a respectable target of investigation in and beyond these fields …

The scientific community has focused the agenda of studies of climate change on lower-end
warming and simple risk analyses, because more realistic complex assessments of risk are …