The path to modern pogonology was not always straight or even. The dead ends and detours were many.

So what keeps wolves and coyotes from interbreeding in nature? Obviously, those who don't misbreed will leave more viable offspring.

GFE, idiot: look it up yourself and stop bothering me.

July 9, 2015, “An Observational Study of Honey Bee Colony Winter Losses and Their Association with Varroa destructor, Neonicotinoids and Other Risk Factors”, in PLOS ONE, DOI:10.1371/journal.pone.0131611: