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Giants of Old (Nephilim)
In Real life, a larger version of a human being is not just about size magnification
Comparative Physiology; Limits to Size Owing to the Laws of Physics
One of the more curious conspiracy theories in existence is the one about aliens aka fallen angels aka the nephilim who had intercourse with human females and thus gave rise to “giants and mighty men of renown”. The theory suggests that giant human beings up to 36 feet tall existed in the past and that skeletal remains have been found to prove it. Other sources say that the proof, mainly by photography, is either art or hoaxes. Could it be possible to have a “scaled up” version of human beings that exist? Are these people responsible for the building of huge megalithic structures around the world, such as obelisks that weigh up to 500 tons that we have no hope of budging let alone set upright? There is no doubt that the world is filled with mysteries that specialists are attempting to explain. But 13 to 36 foot tall human beings is a stretch based on the presented evidence.
Let us do a little simple math. Given a 6 foot tall human being weighing in at 220 pounds and compare it to the “discovered” 13 foot tall human being that would be approximately nine times the weight closing in around a ton (2,000 pounds). You can see that the supporting skeleton would have to be more robust in order to support the weight and the activating more massive muscles. A typical human femur can withstand a lateral blow of 2,000 pound, instantaneous over pressure before breaking. Given that the 13 foot human would have to run for one reason or another, a typical scaled up femur would be approaching the breaking point just for running. If we take the rest mass alone of 9.81 ft/sec.2 and double that, the instantaneous mass of acceleration and motion relative to a fixed object would double to 4,000 pounds. Thus, the femur of the 13 foot human would not just be scaled up, but more massive in addition to achieve sufficient bone strength. It would be the difference seen between the average human bone and one from a creature that we know weighs a ton, like a polar bear or a bull. Even here, the comparison has to be conditioned on the fact that humans are bipedal whereas the bear and bull are quadrupeds. If the bone circumference were increased, that risk would lower, but it would mean a more stocky appearance as a result and would increase over all weight to exceed a ton. Can such a scaled up human being run fast? Given other large animals like a horse or a bull, the answer would be yes, if the bones were of the right load bearing size. Such a person would likely be capable of running as fast as a horse or bull, whereas a normal human could not. The calorie expenditure for a 13 foot tall person would be comparatively larger and they would have to eat like a horse, that is, a lot more than you or I. They would have to eat more frequently. Heat dispersion is another problem. A person of such a size would be more tended to lethargy as running generates a lot of heat to the point of overheating and collapse. Thus, they would either have to sweat profusely and therefore drink a lot more, or prefer the shadier and cooler climes plus spending lots of time swimming or bathing in cool water.
Doing comparative physiology between sea creatures and land creatures we readily see that the skeletons of sea creatures are not as robust as those of land creatures. This is because sea creatures have bodily support of the water. Submerged and at rest, they are in essence in a near zero gravity environment. NASA has exploited this buoyancy of water to train virtually all of its astronauts. In sea vertebrates, the bones are there more for muscles to work in a rhythmic manner to give movement. Fish like sharks have mostly cartilage for skeletons and do extremely well so as long as they are in the natural environment of the ocean. This would not work on land. Consider bird skeletons that are evolved so that the breast bone can withstand the action of the wings and the driving muscles for flight.
Modern culture also has tales of huge humans
Cats have a tremendous size variation and thus give us some insight into bone mass questions
Since we don't have any living adult 13 foot tall human beings to do a comparison with a pygmy, we will look at cats that have a tremendous size variation between a small house cat to a full grown tiger that exist today for our analysis. Cats have one of the greatest size variations on the planet, so we can do a parallel comparison using cat sizes. Some are also highly adapted such as the cheatah. By comparing the skeletons of a domestic cat and a tiger, we can easily see the differences, when they are scaled to the same approximate size. Note the more robust spine and limbs of the tiger compared to the house cat. The spinal column is not as arched and the legs are typically held straighter. It requires less energy to stand with straight legs than with bent legs. In addition, the healthy adult house cat averages about eight pounds whereas a full grown Bengal tiger can weight up to 670 pounds. Taking an eight pound house cat and comparing it to a full grown male tiger, we can see a 84 times difference in weight. The house cat measures on average from nose tip to tail tip about 10 inches. A tiger will measure about 11 feet; an over 11 fold variation in linear dimension. The tiger being much larger, of course has a much larger skeleton. But by scaling them to the same approximate size we can immediately see the differences. If indeed humans once had such size variations from three feet to 36 feet, that would be a twelve fold difference that would compare to cat variations.
Taking the average human being and the largest nephilim allegedly recorded, we should expect to see not just a more massive skeleton, but physiological differences in bone structure, that if they were scaled to be the same size, would show up in more bone mass. The spine would be far more robust, especially close to the pelvic bone. The femurs, tibia, fibia and foot bones also more massive. More massive bones, greater muscles and tissue would make them far less flexible as well and slower running. Their size would not necessarily mean faster running, just as a charging elephant cannot run much faster than the much smaller zebra or wildebeest. In fact, some smaller animals can run much faster than larger counterparts. The cheetah can run much faster than any other cat due to its amazingly flexible spine. The existing photographs of so called nephilim humans do not show these traits. In fact, they appear to be more along the line of photo enlargement. As an example of this, we present a human skeleton for a normal sized human of six feet versus a scaled up twelve foot nephilim. They are really the same depiction where one is scaled up to twice the height with no other adjustment. The bones certainly look larger, but they would also need to be more massive to accommodate the much greater mass of the larger body. These are some of the considerations when looking at scaling up skeletons for various reasons. Given these ideas, the skeletons of the ancient giants would have to be much stockier than those of a typical human.
This video is one of hundreds on the subject of huge human giants
There is yet another problem of large size referred to as black body radiation. For mammals this translates into being able to vent waste heat effectively. Black body radiation works like this. Radiation dissipates to the square of the area of a surface, but to the cube of the volume. This difference causes heat retention longer in large mass objects and faster radiation in low mass objects. Objects with a high area to volume relationship radiate heat faster than those with a low area to volume relationship. Nature often works out a solution such as the large ears of the elephant that dump waste heat. In human beings, the solution is worked out in the differences of short and stocky people who work well in cold climate and tall thin people that work better in hot climes. We have encountered this kind of area to surface ratio before concerning weight and bone mass. Once more, this law of physics works itself out by limiting the size of the giants who with their much greater volume to surface relationship, have a difficulty radiating body heat. Nephilim giants would thus prefer a cool or even a frigid environment and we can see an example of this where greatly overweight people like to dress lighter, even in cool or chilly weather. Both overweight people find and nephilim giants would thus find heat stifling, even deadly, especially if they have to move with any vigour. They would have to sweat profusely, which means they would require a lot more water. The only way that nature seems to solve the problem for humans is to make them tall and thin so that the surface area of the body increases to radiate more heat. Here we have something of a contradiction where a scaled up human being would increase in mass by the cube of the scaled difference and only the square of the total body surface area in the same scales. Thus to have a twelve foot person would limit them to certain situations where internal heat would not do the same to them as a heat wave does to us. The more massive they are, the more this is true. Some people claim that there were human giants on the order of 36 feet tall. These huge humans would be on the order of eight or nine tons on the low end of the weight scale, likely more due to more robust bones, muscles and lungs. They would not work well in a hot climate and might have to frequent cooling waters which would also support their mass. The problems that such giants would face are the same for all large mass animals. They would need copious amounts of water, a lot more food than us and they would also have to work harder against their own internal contradictions.
A much more massive body would also require plenty of oxygen and the lungs to extract it. In the days of the dinosaurs, the atmosphere contained about 33 % oxygen. Then there was a cataclysm of huge proportions that caused a fall off of oxygen to 10 %. Today, the level is back up to about 22 to 23 % and falling due to loss of forests and fossil fuel burning. Dinosaurs could get so large because there was a lot more oxygen in the atmosphere and they did not have to work so hard to deliver oxygen to all parts of the body. The climate was also different and it is thought that many were cold blooded, though this is disputed by some sources. In the era of alleged super-human giants, they would have to work with the oxygen levels we have today which would limit them to the lower atmosphere and the cooler climes and coastlines. Due to these conditions, they would likely been avid fishers, living on the abundance of the sea. Perhaps there were giants in those days as alluded in the Bible and other legends, but they would have to follow the limitations physics places on their bodies. The evidence provided by some sources is questionable at best.
This does not mean giants don't exist; they do!, the difference in size is not a far reaching as with the ideas around the nephilim. The differences we see today are well within the limits for extremes in sustainable body size. Today, adult human beings range in size from two feet to eight and not much more.
Birds vs human
Human and T Rex
Human and nephilim
Compare these tibias from a 6 ft. 8 in. tall Roman giant to a person that is normal for a Roman.
- Ancient Roman Giant Found—Oldest Complete Skeleton With Gigantism
It's no tall tale—the first complete ancient skeleton of a person with gigantism has been discovered near Rome, a new study says.