The curious generalist will be interested in this rewarding introduction to palaeoanthropology by Juan Luis de Arsuaga, 'The Neanderthal's Necklace: In Search of the First Thinkers.' Its ocassionally digresses to discuss Europe's weather and geography at the time, the mammal and other fauna, tools and the bigger picture about fossils, physiognomy and handedness, etc., but this can be instructive too. After all new information about Neanderthals and our other homonid ancestral cousins comes to light almost monthly in recent times, so a book like Arsuaga's is useful not for its new information but by illustrating how the science proceeds to make discoveries and its scientists think.
The earliest Neanderthals fossils date from 200,000 to a quarter-million years ago, when mammoths and woolly rhinoceroses roamed Europe. These cousin humans buried their dead, and crafted stone tools and built fires probably using both to stampede those beasts off cliffs.
Our direct ancestors, Cro-Magnon man, probably arrived from the Middle East more recently, probably some 40,000 years ago, and spread across the continent.
So for fully ten thousand years after that, there was "...a long period of coexistence [and of] irregular contact" between the two populations (p. 287), according to Arsuaga. When an arctic cold swept across Europe around 30,000 years ago, the Neanderthals headed south. Their last known presence is in Spanish seaside caves, so those remaining members of that homonid group probably died out near the Mediterranean. The evidence is still insufficient, according to Arsuaga, to speculate about their end, although some say the Neanderthal extinction was our first genocide.
This book's methods and areas of palaeoanthropological study explore what counts as evidence in this science, the inferences drawn from what kind of data, controversies that remain and those now resolved.
As regards physiological heat loss versus retention, apparently increases in the diameter of body cylinders (limbs, etc.) mean reduced overall body surface exposed, relative to volume. Such reductions effectively lower the potential for bodily heat loss. As it happens, male Neanderthals likely averaged a robust 200 lbs of muscle, but their greater girth in thorax and (shorter) limbs adapted them well for a colder Europe. The leaner, taller, less muscular Cro-Magnon only found Europe hospitable once the climate warmed up.
While Cro-Magnon's brains sit above the face, the Neanderthals' cranium was behind it. Around the middle of the 20th century a consensus was reached that the Cro-Magnon's brains were actually slightly smaller to the Neanderthals'; before this time, they were regarding as a brutish, earlier relative to Cro-Magnon, not as contemporaneous.
Handedness--as in left- and right-handedness--is of anthropological interest as it signals a differentiation of brain function into hemispheres, the presence of which is an indicator of greater mental capacities than the brains of beings without handedness.
Yet one might ask: what kind of evidence derived from fossil remains could possibly help to determine handedness? Neanderthal teeth, it turns out, show consistently uneven wear on one side than on the other, which indicates handedness. A higher level of intelligence than was once ascribed to these homonids is thereby corroborated.
Although less conclusive, Arsuaga touches on conjectures about Neanderthal speech drawn from skull morphology. Their cranial structure would apparently prevent voicing or bar the articulation of certain vowels. Assuming Aristotle's view about the isomorphism between language and thought, it would be hard to reconcile this with Arsuaga's claim that "...we have no reason to believe Neanderthals were less intelligent than we are" (p. 91). The claim about full rationality, so that Neanderthals were, by and large, Cro-Magnon's (or our) equals, would seem to be at odds with this observation about limited speech.
Tool-use began with African predecessors of both human branches--and also occurs with bonobos, chimpanzees and some bird species. Arsuaga seems to hold that tool-making tools are what represent the key evolutionary milestone: their portability initially enlarged the radius of action from trees and vegetated areas, permitting proto-man to forage and stray. A stone carried to chisel weapons and hammer- and axe-like tools shows planned behavior, an awareness not just beyond a spatial radius but into the wider temporal compasses required by projected hunts and explorations.
Tools have further implications, such as meat-eating--which occurs only with devices to cut and chop carcasses--and an ability to make weapons to hunt live prey, rather than settle for eating carrion.
The Cro-Magnon migration to Australia forty to sixty thousand years ago is another related marker that presumes capacities beyond prizing tool-making tools. That voyage called for intellection, a capacity to plan, coordinate and undertake boat-building for a far-ranging project--which, in turn, assumes some developed form of language. Furthermore, this skill to foresee itself relates to an awareness of risk and injury and death, and the mental capacity that these imply.
Arsuaga also raises a speculative 'grandmother hypothesis,' about the inception of menopause (pp. 160-165), which posits that older women's diminished strength for breeding and child-rearing, past the end of ovulation, helps to reduce infant mortality rates at one remove. Those women, he speculates, start to help their daughters with child-care--opening a door to human longevity, which also benefits men.
The necklace in the title refers to Arsuaga's find in one Neanderthal grave. Few attribute cave art to Neanderthals, but they apparently did decorate themselves. One of the most speculative limbs our author climbs onto to support his view of Neanderthals' full humanity is that awareness of death arouses a drive to celebrate life and the present--and what better way than by decorating oneself? Poetic and perhaps intriguing, but not Arsuaga's most convincing conjecture.
The book has more than a dozen fairly good, mostly drawn illustrations, but would have gained with more, and better ones--including maps, photos, depictions based on fossil evidence of cranial and skeletal shapes, tool types, grave findings, the necklace in the title, etc.
Those who remark that 'irregardless' is unforgivable from a translator will get no pushback from me, although the single instance here is not really indicative. This book reads smoothly, not least in reflecting Arsuaga's humor, which calls for a certain skill in translation.
This fine survey of the field will reward anyone curious about this subject.
PS: Anyone interested in more about these topics should consider Ian Tattersall's fine books - including 'The World From Beginnings to 4000 BCE' and 'The Fossil Trail: How We Know What We Think We Know About Human Evolution.' Tattersall also has a clear writing style and a rigorous approach, though it may lack Arsuaga's near-avuncular tone. Still, he covers much the same material in greater detail without talking down to his readers.