A Type D personality is distressed, Type D's have a negative outlook towards life and are pessimistic. A small event that is not even noticed by type B can ruin type D's day. Type D personalities are more subject to depression than other personality types.
For most of human history, horses were seen as prey to be hunted for sustenance. During the late Pleistocene, around 55,000 years ago, Neanderthals scavenged off of horse carcasses and made occasional kills of their own.
History of the Horse: Since horses can live in many diverse environments, they have all evolved in many different ways. The earliest ancestor of the modern horse (Hyracotherium), which lived around 60 million years ago, was a small animal with paws, which browsed and ate shrubs and leaves growing low to the ground.