Encyclopedia of Evolution.pdf - Online Reading Center
Encyclopedia of Evolution.pdf - Online Reading Center
Encyclopedia of Evolution.pdf - Online Reading Center
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Neandertals<br />
different species <strong>of</strong> human. Only much later were the Gibraltar<br />
specimens, which were lying in a museum, recognized as<br />
also being Neandertal remains.<br />
Then in 1856, some obviously human limb bones, pelvis,<br />
and portion <strong>of</strong> a cranium were found by workmen excavating<br />
the Feldh<strong>of</strong>er Grotto in a limestone cliff in Germany. The<br />
cliff overlooked the Neander Valley (Neander-thal in German)<br />
through which the Düssel River flows toward its confluence<br />
with the Rhine at Düsseldorf. The valley was named<br />
after Joachim Neander, a 17th-century teacher and theologian<br />
who became famously controversial when he refused to<br />
take Holy Communion. The Neander Valley was to become<br />
famously controversial once again. The workmen brought the<br />
bones they had unearthed to a local schoolmaster and amateur<br />
naturalist, Johann Fuhlrott. Fuhlrott contacted Hermann<br />
Schaaffhausen, an anatomist at the University <strong>of</strong> Bonn. The<br />
cranium was human but had features, particularly a prominent<br />
eyebrow ridge <strong>of</strong> bone, not found in modern people.<br />
Fuhlrott and Schaaffhausen jointly presented the news <strong>of</strong><br />
the discovery to scientists in Bonn in 1857, suggesting (two<br />
years before Charles Darwin published his famous book) that<br />
a “barbarous and savage race” had once occupied the cave<br />
(see Darwin, Charles; origin <strong>of</strong> species [book]). When<br />
Huxley wrote Man’s Place in Nature in 1863, he included<br />
a sketch <strong>of</strong> the Neander Valley specimen as evidence <strong>of</strong> the<br />
animal origins <strong>of</strong> the human species (see Huxley, Thomas<br />
Henry). William King, student <strong>of</strong> Charles Lyell and a pr<strong>of</strong>essor<br />
<strong>of</strong> geology at Queen’s College in Belfast, Ireland, proposed<br />
the scientific name Homo neanderthalensis for this race<br />
<strong>of</strong> people, recognizing them as a separate species.<br />
Some scholars who maintained the separate creation<br />
<strong>of</strong> modern humans dismissed the skeletal fragments as<br />
being merely deformed modern individuals. (To this day,<br />
both creationist books and some evolution museums present<br />
reconstructed Neandertals in modern dress and grooming,<br />
with the caption, “Have you seen this man?”). August<br />
Mayer, a pathologist at the University <strong>of</strong> Bonn, claimed as<br />
late as 1864 (after the publication <strong>of</strong> both Darwin’s and<br />
Huxley’s books) that the bones were from a Cossack soldier<br />
who was wounded in the Napoleonic war <strong>of</strong> 1814 and had<br />
climbed into the cave to die. Huxley retorted that it was<br />
remarkable that a mortally wounded soldier would crawl<br />
60 feet up a cliff, remove all clothing and belongings, seal<br />
the cave, and bury himself under two feet <strong>of</strong> soil. Another<br />
anthropologist noted a poorly healed arm fracture and<br />
speculated that the Neandertal had grown his brow ridge<br />
because <strong>of</strong> frowning in pain. The anatomist Rudolf Virchow<br />
claimed that the Neandertal specimens were merely<br />
modern people.<br />
But it was not long before nearly everyone recognized<br />
that the Neandertals were a very ancient race <strong>of</strong> people. Their<br />
physical features (described below) contrasted noticeably not<br />
only with those <strong>of</strong> modern humans but also with the Cro-<br />
Magnon “cave men” that also lived in Europe. In scientific<br />
theory and in the popular mind, Neandertals were seen as<br />
the crude ancestors <strong>of</strong> the refined and noble Cro-Magnon.<br />
According to most scholars through the middle <strong>of</strong> the 20th<br />
century, Neandertals evolved into modern Europeans. The<br />
current scientific explanation is quite different and is presented<br />
below.<br />
Where Did Neandertals Come From?<br />
Between 300,000 and 200,000 years ago, the hominins that<br />
lived in Europe (usually classified as Homo heidelbergensis,<br />
named after the Heidelberg Man fossil; see missing links)<br />
had begun to evolve characteristics that were similar to<br />
Neandertals; in particular, larger brains. By about 120,000<br />
years ago, throughout Europe and adjacent regions <strong>of</strong> Asia,<br />
the set <strong>of</strong> characteristics that scientists associate with Neandertals<br />
had evolved. Neandertals, therefore, probably evolved<br />
in Europe and migrated to adjacent areas.<br />
What Did Neandertals Look Like?<br />
Scientists have recovered bones <strong>of</strong> more than 275 individuals,<br />
and stone artifacts from many sites occupied by Neandertals:<br />
They had brains as large as those <strong>of</strong> modern humans.<br />
The shape <strong>of</strong> the Neandertal brain, however, was different.<br />
The frontal lobe was smaller (their foreheads sloped more<br />
than those <strong>of</strong> modern humans) but the occipital lobe (in back)<br />
was larger. Some people cite the smaller frontal lobe as evidence<br />
<strong>of</strong> lesser intelligence, and others cite the larger occipital<br />
lobe as evidence that Neandertals had enhanced sensory perception<br />
(e.g., smell), but this is speculative.<br />
Their skulls had distinctive features. In particular, they<br />
had supraorbital processes, otherwise known as brow ridges.<br />
Earlier hominins also had brow ridges, but the double Neandertal<br />
brow ridge is unique. It is generally assumed that these<br />
thick ridges protected the eyes from injury, to which Neandertals<br />
were especially prone (see below). Other distinctive<br />
features included the lack <strong>of</strong> a prominent chin, and very large<br />
teeth. Wear marks on the teeth suggest that they actually used<br />
their teeth as vise clamps by placing objects <strong>of</strong> stone or wood<br />
or bone in their mouths and working on them with stone<br />
tools.<br />
They were relatively short. Neandertals were less than six<br />
feet (2 m) in height—well within the range <strong>of</strong> modern humans,<br />
but shorter than the average human. Their limbs were shorter<br />
and stockier. The explanation usually given for this is that<br />
they evolved in a cold climate. Modern humans such as the<br />
Inuit who are physically adapted to cold climates also have<br />
short limbs. This feature reduces the amount <strong>of</strong> surface area<br />
that is exposed to cold conditions and therefore reduces the<br />
loss <strong>of</strong> body heat. The Neandertals became extinct during the<br />
most recent <strong>of</strong> the ice ages, but probably not because it was<br />
an ice age. They had survived a previous ice age in Europe.<br />
They had survived equally well in the relatively warm interglacial<br />
period following the previous ice age.<br />
They were very strong. Not only were their limbs short,<br />
but the muscle attachment sites (recognizable on fossil bones)<br />
were quite extensive. In fact, their muscles were apparently so<br />
strong that continual use <strong>of</strong> muscles caused the bones to bend.<br />
Aside from these things, scientists know little about what<br />
the Neandertals looked like. Reconstructions usually show<br />
them as looking like modern humans except for the skeletal