1 Certain parts of the brain shrink, especially the prefrontal cortex (an area at the front of the frontal lobe) and the hippocampus. 2  Both areas are important to learning, memory, planning, and other complex mental activities.
A strong work ethic dog, the Bergamasco is a big fluffy breed with distinguishing characteristics of its coat. The hairs seem to be âdog hairs, âgoat hairs, while wool can also be noticed. These hairs combine to form black or gray mats which grow throughout Read More. Image.
But the large-sized Labrador Retriever is still the number one breed in the U.S. Fashionable dog breeds will come and go, but the biggest dog breeds seem to have staying power (consider the Mastiff). And, though itâs hard to believe, these gigantic breeds are really as big as a horse â OK, maybe a miniature horse.