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Duane, Duane, Duane... :))


> Kristin, Kristin, Kristin,
>
> 1. the 7 footers you are referring to now are the
> outliers (mainly diseased) from a group of people
> who are genetically smaller

I don't know about diseased (unless you're referring to gigantism and/or acromegaly) but this is a possibility.


> 2. these ancients one may be from a group of
> people (another Homo group), one of our genetic
> cousins, who were genetically larger and therefore
> healthy - no need to die young

Again, possible. But without any skeletons there's no way to determine that.
>
> 3. the wiki square-cube article
> [en.wikipedia.org]
> talks about
>
Quote

As was elucidated by J. B. S. Haldane,
> large animals do not look like small animals: an
> elephant cannot be mistaken for a mouse scaled up
> in size. This is due to allometric scaling: the
> bones of an elephant are necessarily
> proportionately much larger than the bones of a
> mouse, because they must carry proportionately
> higher weight.
>
> yet mammoths were larger than present day
> elephants but both look pretty much the same
> proportion
> so a giant mouse would look like a mouse....

You're cherry picking. The law states that as a shape (or an organism) grows, the volume increases faster than the surface area. What Haldane said is that an elephant MUST have larger bones than a mouse because those bones have to carry a lot more weight.

Haldane wrote an essay called On Being the Right Size in which he says:

Quote

The most obvious differences between different animals are differences of size, but for some reason the zoologists have paid singularly little attention to them. In a large textbook of zoology before me I find no indication that the eagle is larger than the sparrow, or the hippopotamus bigger than the hare, though some grudging admissions are made in the case of the mouse and the whale. But yet it is easy to show that a hare could not be as large as a hippopotamus, or a whale as small as a herring. For every type of animal there is a most convenient size, and a large change in size inevitably carries with it a change of form.

Let us take the most obvious of possible cases, and consider a giant man sixty feet high—about the height of Giant Pope and Giant Pagan in the illustrated Pilgrim’s Progress of my childhood. These monsters were not only ten times as high as Christian, but ten times as wide and ten times as thick, so that their total weight was a thousand times his, or about eighty to ninety tons. Unfortunately the cross sections of their bones were only a hundred times those of Christian, so that every square inch of giant bone had to support ten times the weight borne by a square inch of human bone. As the human thigh-bone breaks under about ten times the human weight, Pope and Pagan would have broken their thighs every time they took a step. This was doubtless why they were sitting down in the picture I remember. But it lessens one’s respect for Christian and Jack the Giant Killer.

[irl.cs.ucla.edu]

The square cube law states:

Quote

When an object undergoes a proportional increase in size, its new surface area is proportional to the square of the multiplier and its new volume is proportional to the cube of the multiplier.

The cross section increases by the square of the scaling factor and the mass increases by the cube of the scaling factor.

This explains why the mammoths died out. They were splendidly adapted for cold conditions--their huge size helped them in that regard. But large mammals like that have a very difficult time cooling themselves. When the climate warmed up, they couldn't tolerate it. The same thing goes for elephants. They're wonderful at retaining heat but not so good at getting rid of it.

The same is true of humans. Smaller people get cold very easily--their body heat dissipates quickly. Larger people can stay warm longer and can tolerate much colder temperatures.

Now, take out average 5'7" and scale that up to 8 feet, which is what we're talking about here. First off, you'd lose a lot of muscle strength. Remember, the cross section of the muscle increases by the square of the scaling factor and the mass increases by the cube of the scaling factor.What you'd have is a massive body without the musculature to support it.

Second, the cardiovascular system would have to work really hard to pump blood and oxygenate tissue, which leads to lung issues as well. Why do you think that many people 7 feet or larger die from pneumonia?


> 3. these ancient tall ones were also "Native
> Americans", unless you want to put a cut-off date,
> i.e. before 10,000BC, as to when arrival makes you
> a native versus foreign

Show me a skeleton. That's all you have to do.

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