Cataclysmic eruption may have kicked off ‘worst year” in history for humans – study

The bubonic plague years and the breakout of two World Wars were terrible times. But these were not the worst periods to be alive, scientists claim in new research. It’s the year 536. The 6th century year is thought to have been the beginning of bizarrely cold and dark summers, blamed for causing crop failure […]

Gut bacteria linked to cataclysmic epidemic that wiped out 16th-century Mexico

Enlarge / Entrance of Hernan Cortes into Mexico (credit: Kurz & Allison) In the wake of the Spanish conquest of the Aztec Empire in 1521, waves of epidemics slammed Mexico. By 1576, the population, which had been more than 20 million before the Spanish arrived, had crashed to two million. One brutal outbreak in 1545 […]