Nicolaus Copernicus died #OTD in 1543 -- and if you're looking for something to do on a lazy Saturday afternoon, please enjoy my little video about Copernicus from a few years ago, in which I follow in his footsteps in Warsaw, Torun, Krakow, and Frombork: #science #history https://youtu.be/wqRj0HgIaiE?si=AOMcgv3GY1KeXdY9