The Sterility Asteroid searches out worlds in the Furry Universe to strike down on as a meteor...There are other such asteroids lurking around out there in the cosmos, being that a meteor can fall only once, and on only one planet.
This kind of meteor produces a phenomenon as to where cubs are no longer born. And other things do not propagate their species as well. Females can not get pregnant. And fruit that always had seeds or pits in them no longer have seeds or pits.
Within a couple of hundred years after such an asteroid falls onto a planet, all life there becomes extinct as there are no more generations to carry on the species.