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.
In A Nutshell. The tarpan was a Neolithic-age horse that roamed Europe; its unique ability to live in wet, marshy areas meant that it played a very specific and much-needed role in the balance of marsh ecosystems. They became extinct in Britain sometime during the Neolithic period, but survived in Western Europe until the turn of the 19th century.