Climate change fueled the rise and demise of the Neo-Assyrian Empire, superpower of the ancient world

Ashish Sinha, California State University, Dominguez Hills and Gayatri Kathayat, Xi’an Jiaotong University

Ancient Mesopotamia, the fabled land between the Tigris and the Euphrates rivers, was the command and control center of the Neo-Assyrian Empire. This ancient superpower was the largest empire of its time, lasting from 912 BC to 609 BC in what is now modern Iraq and Syria. At its height, the Assyrian state stretched from the Mediterranean and Egypt in the west to the Persian Gulf and western Iran in the east.

Then, in an astonishing reversal of fortune, the Neo-Assyrian Empire plummeted from its zenith (circa 650 BC) to complete political collapse within the span of just a few decades. What happened?

Numerous theories attempt to explain the Assyrian collapse. Most researchers attribute it to imperial overexpansion, civil wars, political unrest and Assyrian military defeat by a coalition of Babylonian and Median forces in 612 BC. But exactly how these two small armies were able to annihilate what was then the most powerful military force in the world has mystified historians and archaeologists for more than a hundred years.

‘Revolutionary change’ needed to stop unprecedented global extinction crisis

Michelle Lim, University of Adelaide

We are witnessing the loss of biodiversity at rates never before seen in human history. Nearly a million species face extinction if we do not fundamentally change our relationship with the natural world, according to the world’s largest assessment of biodiversity.

Last week, in the culmination of a process involving 500 biodiversity experts from over 50 countries, 134 governments negotiated the final form of the Global Assessment of the Intergovernmental Science-Policy Platform for Biodiversity and Ecosystem Services (IPBES).

IPBES aims to arm policy-makers with the tools to address the relationships between biodiversity and human well-being. It synthesises evidence on the state of biodiversity, ecosystems and natures’ contributions to people on a global scale.

In a study of marine mammals recently published in the Journal Science, researchers have found significant concentrations of polychlorinated biphenyl (PCB) in the tissues of large apex ocean predators such as Orca’s, and Dolphins. Several decades after being outlawed by most industrialized nations, PCBs are still wreaking havoc, and driving large populations of Orca’s toward the edge of extinction.