While excavating a cave in Spain, you stumble across a skeleton that looks to be human. Upon closer examination, you find that the bones are disproportionately short and thick, and the skull has massive brow ridges. Carefully arranged around the skeleton are a variety of stone tools. You have most likely found the remains of a(n)

The remains found in the cave of Spain are most likely those of a Neanderthal man.

Explanation:

The characteristics of geographical location, physical appearance and use of rudimentary tools point to the fact that the remains found are those of a Neanderthal man .

Neanderthal man -whose scientific name is Homo neanderthalensis- lived in Europe more than 40,000 years ago until he became extinct.

Physically he had a skull -with more volume than a human one- and massive brow ridges, due to the existence of a double superciliary arch in the frontal region.  Short extremities, prominent thorax and wide hips are another characteristics.

Neandhertal could make rudimentary stone tools (lithic), catalogued as belonging to the Mustariense culture, related to this species.

Learn more:

Neandhertal man link

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.