Collapsed

Study: Ancient Yersinia pestis and Salmonella enterica genomes from Bronze Age Crete. Image Credit: Microgen / Shutterstock.com

Pathogens in ancient DNA could explain how two civilizations collapsed

The Eastern Mediterranean and Near East regions experienced significant societal changes during the late 3rd millennium Before Common Era (BCE). Recent archaeological studies strongly indicate the influence of prior infectious diseases on societal trajectories. For example, the incidence of Yersinia pestis, which causes the plague, and Salmonella enterica, which causes typhoid/enteric fever, was responsible for the most destructive historic …

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Earth's Magnetic Field Almost Completely Collapsed 550 Million Years Ago

Earth’s Magnetic Field Almost Completely Collapsed 550 Million Years Ago

More than half a billion years ago, Earth experienced an almost-complete collapse of its magnetic field. It began in the early Cambrian period. Then, after a period of about 15 million years, the field began to grow again. The cause of that collapse and the bounceback of the field was a mystery. Then, a group …

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