HumansLeprosy was in the Americas long before the arrival of Europeans The history books say Europeans brought leprosy to the Americas, but analysis of ancient DNA reveals that a form of the disease was present in Argentina and Canada much earlier News
EnvironmentPlagues that shook the Roman Empire linked to cold, dry periods A study reconstructing the climate of Italy during the Roman Empire based on marine sediments shows that three pandemics coincided with cooler, drier conditions News