jaredennisclark wrote:What I find funny is that a large crux of his 'argument' depends on an ARTIST'S RENDITION of a neanderthal.
So this individual would think Harun Yahya's fishing lure was a real caddis fly?
jaredennisclark wrote:He's also assuming Neanderthals to have lived in Africa
And why was the type specimen originally called
Homo neanderthalensis, I ask myself? Oh that's right, because it was found in the Neanderthal Valley in Germany. Since when was Germany part of Africa?
Oh, by the way, a little tangential diversion for you. Whenever you see the ending "-ensis" (or the vocative variant "-ense") in a taxonomic name, it means that the name is a geographical reference to the place where the type specimen was found. From the world of aquarium fishes alone, I can name
Cubanichthys cubensis (a Cyrpinodont from, surprise, surprise, Cuba),
Phallichthys isthmensis (a Poeciliid livebearer from the Isthmus of Panama),
Parachromis managuensis (a large predatory Cichlid fish first found near Managua), i]Cryptoheros panamensis[/i] (another Cichlid, this time from Panama),
Hypsophyrs nicaraguensis (yet another Cichlid, formerly in
Cichlasoma, which, surprise surprise, is from Nicaragua),
Nandopsis haitiensis (a big, bad tempered Cichlid from Haiti), and
Tilapia guineensis (an African Cichlid from Guinea-Bissau, named back in the days when the country was simply Guinea). If I bother to trawl my butterfly taxonomy files, I could probably find dozens of butterflies similarly named.
Plus, the only sites outside Europe known to have produced Neanderthal fossils to date are in Israel, most notably Tabun Cave. Most of the other locations are in France and Germany, with a significant number found in eastern Europe, with an outlier in what appears to be Armenia, numerous finds in Italy, and several significant finds in Spain, including on Gibraltar. This hominid has not, as far as I am aware,
ever been found in Africa. The specimens assigned to the taxon
Homo rhodesiensis, which possesses some features that resemble Neanderthal features superficially, are separated from
neanderthalensis by at least 2,000 miles geographically and pre-date
neanderthalensis by about 100,000 years, indicating that
rhodesiensis occupied a separate branch of the hominid family tree. In any case, the exact phylogenetic position of
rhodesiensis has yet to be determined conclusively, as it is possible that the species is merely a late-appearing geographical variant of
Homo erectus, though if there's one thing I've learned about palaeoanthropology, it's that the area of study is a minefield littered with tank traps for the unwary, and consequently, since far more learned people than I are still arguing (in some cases, bitterly) over the provenance of some fossils, I know better than to make
conclusive statements about fossils that are still the subject of active research. As for
neanderthalensis, however, there is NO doubt about the current known range of this ancestral hominid, and Africa isn't a part of that known range.
jaredennisclark wrote:and further asserts that a flared rib cage goes so far in retaining heat that our body temperature would rise to lethal levels.
Er, this individual obviously knows nothing about surface area to volume ratio and its effect upon heat transfer.
Let's take a look at some simple bodies. First, a sphere. This has a surface area of 4πr
2, where r is the radius, and a volume of (4/3)πr
3. The surface area to volume ratio is therefore 3/r. A cylinder of length L and radius r has a surface area of 2πr
2 + 2πrL. The volume of this cylinder is πr
2L. If L=r, these two equations reduce to 4πr
2 and πr
3 respectively, and the surface area to volume ratio of such a cylinder is therefore 4/r. A cube whose side is of length r has a surface area of 6r
2 and a volume of r
3, therefore the surface area to volume ratio is 6/r. I'll leave it as an exercise for all of you to determine the surface area and volume of a regular tetrahedron of side r, and the surface area to volume ratio for that body.
Basically, any deviation from sphericity increases the surface area to volume ratio. Therefore, if a 'flared' rib cage introduces such deviations, it increases the surface area to volume ratio, and actually makes the resulting body a
better radiator of heat. This is because heat loss to the surroundings is determined by surface area, which is why radiators are designed to have as large a surface area as possible for a given volume. Heat
production in an organism with the relevant metabolic capability, on the other hand, is determined by mass, which in turn is related to volume. This is why creatures that live in cold environments tend to have large bodies (lage mass, therefore large volume, equals large heat generating capacity), and a body shape that tends as closely to sphericity as anatomy and other considerations will allow (e.g., protrusion of limbs, streamlining for swimming in the case of whales etc). Creatures that live in hot environments tend to be small (with a few notable exceptions such as elephants), and tend to have features acting as radiators (those big external ear flaps that elephants have, for example, or the ears of Fennec Foxes). So if a 'flared' rib cage introduces any significant deviations from sphericity, it will make that body
a more efficient radiator of heat than a more compact body.
So, I'd say that this individual is talking out of an orifice more usually associated with a more solid form of waste on the grounds of basic physics and geometry alone.
jaredennisclark wrote:Nor does he seem to consider the fact that, supposing the ribcage to actually be lethal, he's 'investigating' the DEAD body of a specimen.. I would assert that perhaps the reason that particular Neanderthal was dead was BECAUSE of this 'lethal' mutation LONG before I would consider myself to have dis proven evolution.
Which assumes, of course, that the prior two assumptions are anything other than rectally extracted apologetic faeces on the part of this individual.