What Killed Neanderthal Man?

Given that the 'dorf is just a few miles from Neandertal*, discovery place of Neanderthal Man (or Woman, who knows?), I feel a bit of kinship with the group. And just this week I discovered what drove the species to extinction. No, it wasn't competitions with homo sapiens**, disease or anything else -- it was pollen allergies. How do I know? I have the evidence on my balcony:

And while it may not have killed off the Neanderthals, it damn sure feels like it is going to get me.

* In German, you add an "h" in the middle of the last syllable to indicate that a species is named after a town. Or they changed the spelling. Who am I, Dr. Deutsch?
** Go us!