For this one we find ourselves in the trenches of the first world war were Karl Schwarzschild was serving in the German army. 

I am sure that I have pronounced his name wrong, but |I have heard so many versions that I don't know what is right. I did hear a German pronounce it Schwarzscheld, but they pronounce the Schwarz part in a fashion that is well beyond the vocal skill set of this scouser. So he's Karl Schwarzschild, or just Karl for short.