Mr. H's latest

You've heard about the whole issue with Beethoven, haven't you? Well I
guess lately there was some sort of dispute about whether or not some
music was really written by him. To settle the problem, investigators
decided to get a DNA sample from him to find out. But when they went to
dig up his grave (or his tomb, or vault, or whatever it was that he was
in), they found Beethoven sitting there scribbling away on on sheets of
music!

"Beethoven, what are you doing?" they cried.

Undisturbed, he replied, "I'm decomposing."

That's my chemistry teacher's (Mr. H's) latest from this very morning.
Hope it amused you as much is it did me! ;)