Seasonal variation in diet, including the intermittent introduction of plant materials, may have provided reproductive advantages through random mutations that tuned individuals to their environment.

“it's my expectation that there are random mutations that occurred in Brunhilde that I probably have that would mean that yes I could probably do better perhaps I could do better oh I with more meat less plants I am not convinced yet that long term for the rest of my life the absence of plants would be an advantage”