Weird Evolutionary Science

Geneticists are reaching tentative conclusions concerning the origins of Alzheimer's disease, according to Nature. They suspect the same mutations that enabled modern humans to evolve from hominids by becoming markedly smarter. A key clue:

Humans are the only species known to develop Alzheimer's; the disease is absent even in closely related primate species such as chimpanzees.

I didn't know we were its only sufferers, a fact that is highly suggestive. Hat tip to RealClearScience for the link.