Evolution has no moral compass.  We all know that.  And it has no guiding hand.  For that reason, says Christian de Duve, professor emeritus at the Catholic University of Louvain and Nobel laureate (Medicine or Physiology 1974), we may be doomed.

And to get his point across to all sides, he uses an Original Sin metaphor.   
Up to 12 percent of Americans may get Alzheimer's disease, current statistics say.  In the quest to prevent Alzheimer's, or at least make it manageable like diabetes, a group of researchers are working on a nasally-delivered vaccine that promises to protect against Alzheimer's.  Bonus: It may help prevent strokes also.

The new vaccine repairs vascular damage in the brain by using the body's own immune system and, in addition to its prophylactic effect, it can work even when Alzheimer's symptoms are already present, according to the paper in Neurobiology of Aging.