By: The Scribe on Wednesday, July 13, 2011
A theory has been put forth that humans lack body hair in an attempt to reduce the number of parasites that affect us. There are many parasites such as ticks, fleas and lice that actually prefer to make their home in coats of deep fur. Humans lack body hair which makes us unique among primates and in a category shared only by a few semi-aquatic species of animals such as hippopotamuses, dolphins and whales.
The study was developed by a behavioral ecologist and an evolutionary biologist. It basically states that because ancient humans were able to use fire, wear fire and construct shelters they no longer needed the thick coats of fur that early humanoids may have had. The hair on humans still exists in many areas but it has become so fine that it no longer works for heat regulation and no longer can support colonies of annoying parasites.
There are differences in body hair between men and women and the authors of the study say this supports their theory as well. It was believed that hairlessness became a desirable trait in mates and this may have been one reason why women have less body hair than men. A desirable mate was one which was less susceptible to parasitic infestation and being hairless advertised that an individual did indeed possess this desirable trait. It also explained why head and facial hair continued to be so thick. Humans use facial and head hair (or a lack of it) as a way of determining physical attractiveness in a mate. By retaining head and facial hair, this method of determining sexual attractiveness would not have been lost.
In the past, scientists thought that we abandoned our fur coat as a way of surviving in hot environments such as the African savanna. Scientists have accepted this theory even though other primates who lived in the same environment did not lose their hair coats like humans did.
It was also believed that the change in our fur coat came when we left the trees and 
began to dwell on the ground. A third theory stated that we lost our hair coat when we became semi-aquatic approximately 8 million years ago. At that time, humanoids began to swim and to immerse themselves in water. It was not surprising that we would adopt the same kind of thin hair coat that other aquatic mammals had.
Humans were still plagued by parasites even after they became hairless. A number of parasites such as body lice continued to affect early humanoids. They tended to live in the clothing and bedding that humans used on a regular basis. It was much easier to change clothing or bedding than it would have been for humans to get rid of parasites living in a thick coat of hair or fur.
While this theory seems to explain many of the reasons why humans would have lost their body hair it has not totally been proven as fact. Scientists would need to compare the amounts of body hair that populations have against the number of parasites that plague that population. That way they may be able to tell whether humans lost their hair to keep parasites at bay.
By: The Scribe on Wednesday, July 13, 2011
Archaeologists have found eggs belonging to a parasite that plagues modern humans on a series of naturally preserved African mummies. Eggs were found on the mummies as early as the 1920’s but only now have scientists been able to prove that the mummies were infected with Schistosoma mansoni. What is exciting about this discovery is that it proves that the parasite is not just a product of modern urbanization.
The parasites cause a disease known as schistosomiasis. The disease is not usually a lethal one but it can cause lingering health problems including anemia, impaired growth and impaired cognitive development. It can also cause damage to internal organs as well. It can be more serious in children but even in adults it makes day to day living much more difficult.
It is believed that approximately 200 million people are currently affected by schistosomiasis. It is most common in agricultural regions that rely on irrigation channels to keep crops hydrated. Because it tends to thrive in developed areas it was believed that the parasite was actually a product of modern urbanization.
This belief has been challenged by the Nubian mummies. Originally, scientists had thought that a close relative of S. mansoni had left the parasite eggs on the mummies. The eggs were originally thought to be those of S. haematobium. This parasite causes many of the same symptoms but is found in regions other than those with irrigation channels.
Now scientists have been able to determine that the Wadi Halfa were most affected by this parasite. The Wadi Halfa created farms alongside the Nile River approximately 1500 years ago. They utilized irrigation channels in order to keep their crops hydrated. Up to twenty-five percent of the Wadi Halfa were believed to have been infected by schistosomiasis.
The findings are also important because they point to the fact that the Wadi Halfa may have also used irrigation channels. Previously, it was believed that they were not sophisticated enough to have utilized this farming technique. Scientists had previously believed that the Wadi Halfa were reliant on nature in order to plant their crops and keep them irrigated.
Scientists tested skin found on some of the naturally mummified bodies that were unearthed in Egypt. Because the skin was dry and mummified it was possible to test it for various proteins. When scientists tested the skin of African mummies they found proteins that belonged to S. mansoni and not S. haematobium.
The snail that transmits this disease is found mainly in irrigation channels near civilized areas. It prefers standing water that may have higher levels of contaminants and additives in it. It’s relative, S. haematobium is also transmitted via snail but in this case, the snails prefer water that is moving, clean, and well oxygenated.
The discovery was only possible because the mummies had been buried. The environment in the area where they were buried not only preserved the external skin but the internal organs as well. This is different than man-made mummies which may have had the internal organs removed.
By: The Scribe on Monday, July 11, 2011
Historians are now looking at the Salem witch trials in a whole new light. In the past, they had thought that mass hysteria had been behind the conviction and deaths of 25 men and women. Four others were found guilty of witch craft but were not executed.
The year was 1693. The people living in Salem, Massachusetts strongly believed that Satan was both present on earth and very active as well. The settlers had brought this belief with them from Europe where charms were used in order to increase the productivity of both their farming and their agricultural pursuits.
Over time, the harmless “white magic” that allowed fields to produce a larger crop yield and to protect their animals from disease or injury was slowly transformed into something darker. Now people who used witch craft did it to harm their neighbors. If an animal was born with a defect or crops failed it was witch craft that was to blame.
This belief was especially strong in Salem. They blamed the supernatural for every ill that befell them such as arguments or strife between members of the congregation. If a baby died, crops failed or there was any kind of disagreement among the colonists it was Satan and his minions that were to blame. Men such as Cotton Mather and Joseph Glanvill wrote about the supernatural and went a long way to strengthening sentiments against the supernatural.
It didn’t help that in 1692, a group of young girls began to have strange fits. They were examined and it was found that the fits were not caused by epilepsy or any other known disease. The girls were related to Reverend Samuel Parris, a Puritan minister. When the girls had their fits they tended to scream, make strange sounds and even contort their bodies into strange positions. These strange actions were then mimicked by other girls in the town.
Many historians have looked for a reason for the Salem witch trials. They felt that it was mass hysteria that was to blame for the deaths of innocent men and women. In one case, children as young as four testified against some of the members of the Salem community.
Now scientists and historians have a different theory as to the cause of the Salem witch
trials. It is now theorized that ergot poisoning may have been the reason for the fits and strange dreams rather than simple mass hysteria. Ergot is caused by a fungus that grows on rye and other grains that would have been grown in the Salem settlement. The poison can be passed from mother to infant through breast milk, making it possible for very young children to suffer from this condition.
Some of the symptoms include convulsive fits that are very similar to those that the girls had during the trials. Sufferers will experience muscle spasms, parasthesia, nausea and vomiting. They also experience hallucinations similar to those that are produced by LSD.
While it is not possible to blame all of the activities in Salem on ergot poisoning it goes a long way to explaining many of them.
By: The Scribe on Thursday, July 7, 2011
A discovery made in Iklaina Greece has turned out to be the oldest example of decipherable text in Europe. A dig has unearthed many Mycenaean artifacts including a piece of writing made by a Greek-speaking Mycenaean scribe.
Other Mycenaean artifacts were found at the same dig. They included parts of a palace, murals, giant terrace walls and even proof of a drainage system. The Mycenaeans had a very advanced civilization and were able to dominate much of Greece between 1600 BCE and 1100 BCE. The civilization became legendary after Homer mentioned them in his work, the Ilead, which is an account of their war with Troy.
The tablet measures 1 inch tall by 1.5 inches wide. It was written using a writing system known as Linear B. This system was made up of 87 different signs that represented syllables rather than individual letters. The system was usually used to record financial matters that may have been of interest to the ruling elite at the time. This holds true for the pottery fragment that was discovered. Archaeologists have been able to determine that the syllable appearing on the fragment had to do with manufacturing although it is unknown what the rest of the piece would have said in its entirety.
There is also text on the back of the piece as well. This piece of writing includes a list of names as well as numbers. Archaeologists believe that this may have been part of a property list. There are a number of reasons why this find is so big.
The first reason is that the tablets were only meant to last a season and were therefore not made out of clay that was fired. They were dried in the sun and this made them extremely fragile. Because they were so brittle very few of the tablets have been found. They usually turn up in major palaces rather than at digs like the one at Iklaina.
It was believed that the tablet was only preserved as a fluke of luck. It appears as though the tablet was thrown into a fire pit where garbage was being burned. The heat from the burning garbage fired the clay and made it durable enough to last for thousands of years.
It is important to remember that while this is the oldest known sample of writing in Europe it is not the earliest known sample of writing that has been discovered to date. The oldest samples include pieces found in China, Egypt and Mesopotamia. The writing that has been found in those areas dates back to as early as 3,000 BCE. Scientists are hoping to be able to find evidence of an earlier writing system known as Linear A that may have been related to Egyptian hieroglyphics. Scientists and archaeologists have been unable to translate any of the Linear A writings that have been found to date.
Scientists are also hoping that the Linear B writing will give information on how Greek kingdoms may have been organized.
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The study was developed by a behavioral ecologist and an evolutionary biologist. It basically states that because ancient humans were able to use fire, wear fire and construct shelters they no longer needed the thick coats of fur that early humanoids may have had. The hair on humans still exists in many areas but it has become so fine that it no longer works for heat regulation and no longer can support colonies of annoying parasites.
began to dwell on the ground. A third theory stated that we lost our hair coat when we became semi-aquatic approximately 8 million years ago. At that time, humanoids began to swim and to immerse themselves in water. It was not surprising that we would adopt the same kind of thin hair coat that other aquatic mammals had.
