Memory loss more common in people with blood type AB. Several research studies have pinpointed lifestyle changes individuals can make to prevent memory loss, such as keeping stress and blood sugars low, and not smoking.
A dog will shake its head under normal conditions for a few reason, such as when the dog has just gotten out of the water or to shake seeds or burrs from its ear. Even a dog hair can irritate the dog enough to make it shake its head. When your dog shakes it head, it is important to check for any foreign objects, allergic reaction and bites in its mouth, throat and ears if you can.
Well, according to Mental Floss, there's a science behind it: Dogs are trying to tell us that they care (heart melts instantly). Apparently, when a dog tilts its head, it's a symbol that they are showing us empathy and that they are engaged. It's not surprising, really, as we all know how in tune with our emotions dogs can be.