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Evolution is a complex process, just ask the Transylvanian naked-neck chicken

Prior posts have noted that selection factors that influence evolution can be highly variable, and sometimes surprising. It is not the simple "survival of the fitest" postulated by Darwin (who in fairness could not have known about many of the selection factors and processes described in these...

Unexpectedly, Prions Can Move Between Species and Target Organs Other Than the Brain

A recent post noted that viruses from bush meat can jump from one species to the next, and that as such bush meat poses a major health threat. The mobility of prions has also been underestimated. (For a general description of prions, see Prion .) Researchers have shown that engineered mice can be infected...