Scientists find medieval plague outbreaks picked up speed over 300 years – Brighter World https://brighterworld.mcmaster.ca/articles/scientists-find-medieval-plague-outbreaks-picked-up-speed-over-300-years/?fbclid=IwAR0xAspUd2ZbURWNnwGGg-g_yyxoTuPpHuvbwOCR7fW-aKicL0NRY_nvbPU