News Scan Briefs: Eyes on the Tops of Their Heads; Play Dates for Germ Sharing; Another Gene for Alzheimer's (Scientific American)

Not So Rapid Eye MovementThe bizarre metamorphosis that occurs in halibut and other flatfish had even Charles Darwin floundering for an explanation. At birth, these fish have one eye on each side of the skull, but as adults, both eyes reside on the same side. Certainly, for fish that spend their lives along the sea bottom, having both eyes topside confers a survival advantage. But there seemed ...

More...