It’s mind-blowing that today scientists can “extract genetic material from the letters written [in 1475] by Vlad Dracula […] and, from that, build up a picture of not only the physical makeup of the Wallachian warlord who became known as Vlad the Impaler but also the environmental conditions in which he lived.”
Also, I’m not surprised that similar investigations revealed that Mikhail Bulgakov was under morphine when he wrote his masterpiece, The Master and Margarita (one of my all-time favorite books).
Full article is available here.