Volcanic eruption that blocked out the Sun for 18 months in 536 AD

Volcanic eruption that blocked out the Sun for 18 months in 536 AD: Bubonic plague, famine, war and flu pandemics have made some periods of human history infamous for death and suffering but one year stands above the rest in terms of misery; 536AD.According to research from a Harvard professor, it is a prime candidate for the unfortunate accolade of the worst year in the entirety of recorded history.