Was Israel the Birthplace of Modern Humans?

It has long been believed that modern humans emerged from the continent of Africa 200,000 years ago. Now Tel Aviv University archaeologists have uncovered evidence that Homo sapiens roamed the land now called Israel as early as 400,000 years ago -- the earliest evidence for the existence of modern humans anywhere in the world.

The findings were discovered in the Qesem Cave, a pre-historic site located near Rosh Ha'ayin that was first excavated in 2000. Prof. Avi Gopher and Dr. Ran Barkai of Tel Aviv University's Department of Archaeology, who run the excavations, and Prof. Israel Hershkowitz of the university's Department of Anatomy and Anthropology and Sackler School of Medicine, together with an international team of scientists, performed a morphological analysis on eight human teeth found in the Qesem Cave.

This analysis, which included CT scans and X-rays, indicates that the size and shape of the teeth are very similar to those of modern humans. The teeth found in the Qesem Cave are very similar to other evidence of modern humans from Israel, dated to around 100,000 years ago, discovered in the Skhul Cave in the Carmel and Qafzeh Cave in the Lower Galilee near Nazareth. The results of the researchers' findings are being published in the American Journal of Physical Anthropology.

Reading the past

Qesem Cave is dated to a period between 400,000 and 200,000 years ago, and archaeologists working there believe that the findings indicate significant evolution in the behavior of ancient humans. This period of time was crucial in the history of humankind from cultural and biological perspectives. The teeth that are being studied indicate that these changes are apparently related to evolutionary changes taking place at that time.

Prof. Gopher and Dr. Barkai noted that the findings related to the culture of those who dwelled in the Qesem Cave -- including the systematic production of flint blades; the regular use of fire; evidence of hunting, cutting and sharing of animal meat; mining raw materials to produce flint tools from subsurface sources -- reinforce the hypothesis that this was, in fact, innovative and pioneering behavior that may correspond with the appearance of modern humans.

An unprecedented discovery

According to researchers, the discoveries made in the Qesem Cave may overturn the theory that modern humans originated on the continent of Africa. In recent years, archaeological evidence and human skeletons found in Spain and China also undermined this proposition, but the Qesem Cave findings because of their early age is an unprecedented discovery.

Excavations at Qesem Cave continue and the researchers hope to uncover additional finds that will enable them to confirm the findings published up to now and to enhance our understanding of the evolution of humankind -- especially the emergence of modern man.

Lost Civilization

Veiled beneath the Persian Gulf, a once-fertile landmass may have supported some of the earliest humans outside Africa some 75,000 to 100,000 years ago, a new review of research suggests.

At its peak, the floodplain now below the Gulf would have been about the size of Great Britain, and then shrank as water began to flood the area. Then, about 8,000 years ago, the land would have been swallowed up by the Indian Ocean, the review scientist said.

The study, which is detailed in the December issue of the journal Current Anthropology, has broad implications for aspects of human history. For instance, scientists have debated over when early modern humans exited Africa, with dates as early as 125,000 years ago and as recent as 60,000 years ago (the more recent date is the currently accepted paradigm), according to study researcher Jeffrey Rose, an archaeologist at the University of Birmingham in the U.K.

"I think Jeff's theory is bold and imaginative, and hopefully will shake things up," Robert Carter of Oxford Brookes University in the U.K. told LiveScience. "It would completely rewrite our understanding of the out-of-Africa migration. It is far from proven, but Jeff and others will be developing research programs to test the theory."

Viktor Cerny of the Archaeogenetics Laboratory, the Institute of Archaeology, in Prague, called Rose's finding an "excellent theory," in an e-mail to LiveScience, though he also points out the need for more research to confirm it.

The findings have sparked discussion among researchers, including Carter and Cerny, who were allowed to provide comments within the research paper, about who exactly the humans were who occupied the Gulf basin.

"Given the presence of Neanderthal communities in the upper reaches of the Tigris and Euphrates River, as well as in the eastern Mediterranean region, this may very well have been the contact zone between moderns and Neanderthals," Rose told LiveScience. In fact, recent evidence from the sequencing of the Neanderthal genome suggests interbreeding, meaning we are part caveman.

The Gulf Oasis would have been a shallow inland basin exposed from about 75,000 years ago until 8,000 years ago, forming the southern tip of the Fertile Crescent, according to historical sea-level records.

And it would have been an ideal refuge from the harsh deserts surrounding it, with fresh water supplied by the Tigris, Euphrates, Karun and Wadi Baton Rivers, as well as by upwelling springs, Rose said. And during the last ice age when conditions were at their driest, this basin would've been at its largest.

In fact, in recent years, archaeologists have turned up evidence of a wave of human settlements along the shores of the Gulf dating to about 7,500 years ago.

Israeli company uses nanotechnology to develop paint that makes planes disappear off radar

Imagine for a moment what the battlefield will look like in the future. Unmanned planes flying through the air; robots fighting on the ground; smart missiles hunting down targets. Now imagine that none of this can be detected on radar screens.

It may sound fictional, but it's happening. An Israeli company called Nanoflight is currently developing a special paint that makes drones, missiles, or war craft simply disappear. Or, to be more precise, they become very difficult to detect.

The critical stage in developing the paint, which was developed in a nanotechnology lab, has recently concluded, and a successful test run was conducted this week. For the test run, a thin layer of the material was painted on dummy missiles, and radar waves aimed at them had a difficult time registering them.

The paint particles don't make the missile's detection on the radar disappear completely, but make it exceedingly difficult to positively identify the object as a missile. In the future, this development will allow any missile or jet significantly decreased radar detection.

Even though they may not entirely disappear from radar screens, this technology is a considerably more cost-effective method to evade radar detection than purchasing an American stealth plane for $5 billion.

How does it work? In order to locate objects, the radar transmitter sends out electromagnetic waves. When these waves hit an object, they are scattered in all directions, with some of them being bounced back to the radar itself. Regular signal reception indicates the existence of an object.

The nanotechnology developed envelopes the object, absorbs the radio waves emitted by the radar, and releases them as heat energy scattered in space. In doing so, the material disguises the object, making it difficult to identify by radar.

"We are only at the beginning and are discovering new worlds everyday," said Eli Shaldag, a former senior Israel Air Force official who worked on the Arrow missile project. He currently is part of the military applications department of Nanoflight.

"This is a breakthrough with the potential to change the rules of the game in the battlefield," Shaldag said.

When will the material be ready for use on war craft?

"We have already completed the main development stage. We conducted a number of tests and discovered that the particles in their nanotechnology composition do significantly neutralize the ability to detect objects that have been painted with the material. We are entering the second stage, after which we will already be able to produce the material in larger quantities."

Will this material be applicable for additional uses in the future?

"Absolutely yes. Discovery of nanotechnology materials is still in its infancy, and we are decoding the secret of this technology's power every day. We are currently working on developing an application of the material that will work with infrared so that soldiers won't be detected on night-vision goggles."

According to company officials, the material can also be used for civilian purposes."Just like the nanotechnology material can prevent a radar from detecting a missile, it can also prevent radiation emitted by electrical transformers from reaching nursery schools," said Nanoflight CEO Ricardo Burstein.

Burstein also noted that the material can prevent pollution through its absorption and transformation properties.

"In the future, it could be painted on sidewalks and roads in order to decrease air pollution. We are currently conducting an experiment with the City of Ramat Gan in which we are painting guardrails with the material in order to purify pollution from cars," Burstein explained.

Italian scientist reproduces Shroud of Turin

ROME (Reuters) – An Italian scientist says he has reproduced the Shroud of Turin, a feat that he says proves definitively that the linen some Christians revere as Jesus Christ's burial cloth is a medieval fake.

The shroud, measuring 14 feet, 4 inches by 3 feet, 7 inches bears the image, eerily reversed like a photographic negative, of a crucified man some believers say is Christ.
"We have shown that is possible to reproduce something which has the same characteristics as the Shroud," Luigi Garlaschelli, who is due to illustrate the results at a conference on the para-normal this weekend in northern Italy, said on Monday.

A professor of organic chemistry at the University of Pavia, Garlaschelli made available to Reuters the paper he will deliver and the accompanying comparative photographs.
The Shroud of Turin shows the back and front of a bearded man with long hair, his arms crossed on his chest, while the entire cloth is marked by what appears to be rivulets of blood from wounds in the wrists, feet and side.

Carbon dating tests by laboratories in Oxford, Zurich and Tucson, Arizona in 1988 caused a sensation by dating it from between 1260 and 1390. Sceptics said it was a hoax, possibly made to attract the profitable medieval pilgrimage business.But scientists have thus far been at a loss to explain how the image was left on the cloth.

Garlaschelli reproduced the full-sized shroud using materials and techniques that were available in the middle ages.They placed a linen sheet flat over a volunteer and then rubbed it with a pigment containing traces of acid. A mask was used for the face.

PIGMENT, BLOODSTAINS AND SCORCHES

The pigment was then artificially aged by heating the cloth in an oven and washing it, a process which removed it from the surface but left a fuzzy, half-tone image similar to that on the Shroud. He believes the pigment on the original Shroud faded naturally over the centuries.

They then added blood stains, burn holes, scorches and water stains to achieve the final effect.

The Catholic Church does not claim the Shroud is authentic nor that it is a matter of faith, but says it should be a powerful reminder of Christ's passion.

One of Christianity's most disputed relics, it is locked away at Turin Cathedral in Italy and rarely exhibited. It was last on display in 2000 and is due to be shown again next year.Garlaschelli expects people to contest his findings.

"If they don't want to believe carbon dating done by some of the world's best laboratories they certainly won't believe me," he said.

The accuracy of the 1988 tests was challenged by some hard-core believers who said restorations of the Shroud in past centuries had contaminated the results.The history of the Shroud is long and controversial.

After surfacing in the Middle East and France, it was brought by Italy's former royal family, the Savoys, to their seat in Turin in 1578. In 1983 ex-King Umberto II bequeathed it to the late Pope John Paul.

The Shroud narrowly escaped destruction in 1997 when a fire ravaged the Guarini Chapel of the Turin cathedral where it is held. The cloth was saved by a fireman who risked his life. Garlaschelli received funding for his work by an Italian association of atheists and agnostics but said it had no effect on his results.

"Money has no odor," he said. "This was done scientifically. If the Church wants to fund me in the future, here I am."

Menorah dating for 2000 years discovered

Israeli archaeologists have uncovered one of the earliest depictions of a menorah, the seven-branched candelabra that has come to symbolize Judaism, the Israel Antiquities Authority said Friday. The menorah was engraved in stone around 2,000 years ago and found in a synagogue recently discovered by the Sea of Galilee.

Pottery, coins and tools found at the site indicate the synagogue dates to the period of the second Jewish temple in Jerusalem, where the actual menorah was kept, said archaeologist Dina Avshalom-Gorni of the Israel Antiquities Authority. The artist might have seen the menorah during a pilgrimage and then recreated it in the synagogue, she suggested.

A small number of depictions of the menorah have surfaced from the same period, she said, but this one was unique because it was inside a synagogue and far from Jerusalem, illustrating the link between Jews around Jerusalem and in the Galilee to the north.The menorah, depicted atop a pedestal with a triangular base, is carved on a stone which was placed in the synagogue's central hall.

The temple in Jerusalem was destroyed by Roman legions in 70 A.D.. The Arch of Titus in Rome, erected to mark the Roman victory, depicts troops carrying the menorah from Jerusalem to symbolize the defeat of the Jews. The menorah became a Jewish symbol and is featured today on Israel's official emblem.

Most other depictions of the menorah were made only after the temple's destruction, and if this finding is indeed earlier it could be closer to the original, said Aren Maeir, an archaeology professor at Bar-Ilan University in Israel."If you have a depiction of the menorah from the time of the temple, chances are it is more accurate and portrays the actual object than portrayals from after the destruction of the temple, when it was not existent," he said.The ancient prayer house was discovered in the town of Migdal, usually identified as the birthplace of the New Testament's Mary Magdalene, whose name is thought to be based on the town's

Archeologists find 120 coins from the Bar Kokhba Revolt era

Israeli archeologists unveiled never before seen historical artifacts from a recent discovery of a Judean Hills cave used by Jewish refugees during the Bar Kokhba rebellion in 132-35 CE. The findings were presented at a press conference held at the Hebrew University in Jerusalem, Wednesday morning.

The massive discovery marks the first time Israeli researchers have ever found a large hoard of ancient coins from this era. The gold, silver and bronze coins, 120 in all, were discovered in an undisclosed location within the 'Green Line' of Israel. The unlocking of the almost inaccessible cave also yielded iron weapons, storage jars, oil lamps, a juglet, a silver earring and a glass bottle.

The 20-meter deep cave and its bounty are continuing to be explored by Prof. Amos Frumkin and Boaz Langford of the Cave Research Unit in the Department of Geography of the Hebrew University and Dr. Boaz Zissu and Prof. Hanan Eshel of the Department of Land of Israel Studies and Archaeology at Bar-Ilan University. The project is made possible with the support of the Israel Nature and Parks Authority. The artifacts are believed to be solid evidence proving the theory that Jews found refuge in the Judean Hills during the time-period.

With this find, Prof. Zissu said that the distribution of the coins in the region helps to further "indicate the geographical extent of the Jewish presence outside of Jerusalem" during the Roman occupation of the land of Israel. Prof. Zissu further explained that "since there is not a definitive historian (from the era), we have to rely on the information we find from the coins and discoveries."

Prof. Frumkin added "this discovery verifies the assumption that the refugees of the revolt fled to caves in the center of a populated area in addition to the caves found in more isolated areas of the Judean desert." The researchers believe that the Judean Hills cave served as a hiding place, with its proximity to the ancient city of Betar, for a dozen or more Jewish fighters.

Prof. Frumkin theorises the possibility "that the occupants were of a special status" in relation to the strategic location of the cave, the weapons and the amount of money that was found.

Finding a cave of such magnitude explained Frumkin "provides the archaeological context of the people" who were at the time managing to re-establish Jewish sovereignty.

A majority of the discovered coins were in excellent condition, which helped the researchers delve deeper into the mysteries of the era. Most of the coins were originally Roman designed and manufactured. Thereafter, Jewish fighters pressed their own insignias into the coins. Leaders of the Jewish resistance imprinted and dated coins for each year of the rebellion with, for example, images of the exterior of the Second Temple in Jerusalem and poetry for reclaiming Jerusalem as a means for spreading the rebellion via currency.

The Bar Kokhba Revolt was fought against the Roman Empire and it was last of the Jewish-Roman wars. The revolt, led by Simon bar Kokhba, was meant to put down the Roman occupation of the land of Israel. Bar Kokhba managed to establish a Jewish state over parts of Judea, as Jews were banned from living in Jerusalem or visiting the site of the destroyed Second Temple. For almost two years until the Roman armies put down the resistance, Jewish resistance fighters inflicted heavy casualties upon the Roman army. Staggering estimates of the Jewish death toll exceed 500,000 civilian causalities and almost 1,000 towns destroyed by the Roman army. Many scholars view the Bar Kokhba Revolt as the beginning of the Jewish Diaspora.

Prof. Frumkin expects further discoveries in the area to surface but "none possibly on this scale." While the occupants of the cave were never to reclaim their belongings, the discovery of their items and future ones as well, are helping to unlock an almost 2,000 year-old unsolved history of the Jewish people in the land of Israel.

Archaeologists find 3,700-year-old wall in Jerusalem

Archaeologists digging in Jerusalem have uncovered a 3,700-year-old wall that is the oldest example of massive fortifications ever found in the city, the Israel Antiquities Authority said Wednesday. The 26-foot-high wall is believed to have been part of a protected passage built by ancient Canaanites from a hilltop fortress to a nearby spring that was the city's only water source and vulnerable to marauders.

The discovery marks the first time archaeologists have found such massive construction from before the time of Herod, the ruler behind numerous monumental projects in the city 2,000 years ago, and shows that Jerusalem of the Middle Bronze Age had a powerful population capable of complex building projects, said Ronny Reich, director of the excavation and an archaeology professor at the University of Haifa.

The wall dates to the 17th century BC, when Jerusalem was a small, fortified enclave controlled by the Canaanites, one of the peoples the Bible says lived in the Holy Land before the Hebrew conquest. The kingdom thought to have been ruled from Jerusalem by the biblical King David is usually dated to at least seven centuries later.

Mosquito Bites and why some people are immune?

If you're one of those people whom mosquitoes tend to favour, maybe it's because you aren't sufficiently stressed-out. Insects have very keen powers of smell that direct them to their targets. But for researchers trying to figure out what attracts or repels the pests, sorting through the 300 to 400 distinct chemical odours that the human body produces has proved daunting.

Now scientists at Rothamsted Research in the U.K. have been making headway at understanding why some people can end up with dozens of bites after a backyard barbecue, while others remain unscathed. The researchers have identified a handful of the body's chemical odours—some of which may be related to stress—that are present in significantly larger concentrations in people that the bugs are happier to leave alone. If efforts to synthesize these particular chemicals are successful, the result could be an all-natural mosquito repellent that is more effective and safer than products currently available.

"Mosquitoes fly through an aerial soup of chemicals, but can home in on those that draw them to humans," says James Logan, a researcher at Rothamsted, one of the world's oldest agricultural-research institutions. But when the combination of human odors is wrong, he says, "the mosquito fails to recognize this signal as a potential blood meal."

The phenomenon that some people are more prone to mosquito bites than others is well documented. In the 1990s, chemist Ulrich Bernier, now at the U.S. Department of Agriculture's Agricultural Research Service, began looking for what he calls the "magic compounds" that attract mosquitoes. His research helped to show that mosquitoes are attracted to humans by blends of common chemicals such as carbon dioxide, released from the skin and by exhaling, and lactic acid, which is present on the skin, especially when we exercise. But none of the known attractant chemicals explained why mosquitoes preferred some people to others. Rothamsted's Dr. Logan says the answer isn't to be found in attractant chemicals. He and colleagues observed that everyone produces chemicals that mosquitoes like, but those who are unattractive to mosquitoes produce more of certain chemicals that repel them.

Misguided Mosquitoes
"The repellents were what made the difference," says Dr. Logan, who is interested in the study of how animals communicate using smell. These chemicals may cloud or mask the attractive chemicals, or may disable mosquitoes from being able to detect those attractive odours, he suggests. Besides delivering annoying bites, mosquitoes cause hundreds of millions of cases of disease each year. As many as 500 million cases of malaria are contracted globally each year, and more than one million people die from it, according to the Centres for Disease Control and Prevention. Mosquitoes can also spread West Nile virus, dengue fever, yellow fever and other illnesses. Currently the most effective repellents on the market often contain a chemical known as DEET, which has been associated in some studies with potential safety concerns, such as cancer and Gulf War syndrome. It also damages materials made of plastic. The federal Environmental Protection Agency has determined that DEET, when used as directed, is safe.

The Rothamsted team set out to get the mosquitoes' viewpoint. The researchers separated human volunteers into two groups—those who were attractive to mosquitoes and those who weren't. They then put each of the volunteers into body-size foil bags for two hours to collect their body odours. Using a machine known as a chromatograph, the scientists were able to separate the chemicals. They then tested each of them to see how the mosquitoes responded. By attaching microelectrodes to the insects' antennae, the researchers could measure the electrical impulses that are generated when mosquitoes recognize a chemical.

Dr. Logan and his team have found only a small number of body chemicals—seven or eight—that were present in significantly different quantities between those people who were attractive to mosquitoes and those who weren't. They then put their findings to the test. For this they used a so-called Y-tube olfactometer that allows mosquitoes to make a choice and fly toward or away from an individual's hand. After applying the chemicals thought to be repellent on the hands of individuals known to be attractive, Dr. Logan found that the bugs either flew in the opposite direction or weren't motivated by the person's smell to fly at all.

The chemicals were then tested to determine their impact on actual biting behaviour. Volunteers put their arms in a box containing mosquitoes, one arm coated with repellent chemicals and the other without, to see if the arm without the coating got bitten more.

Significant Repellency
The group's latest paper, published in March in the Journal of Medical Entomology, identified two compounds with "significant repellency." One of the compounds, 6-methyl-5-hepten-2-one, is a skin-derived compound that has the odour of toned-down nail-polish remover, according to George Preti, an organic chemist at the Monell Chemical Senses Centre in Philadelphia, who is involved in a separate line of research into insect-biting behaviour. The other, identified in the paper as geranylacetone, has a pleasant odour, though there is some question about whether the chemical is formed by the human biochemical process or is picked up in the environment, Dr. Preti says.

Dr. Logan declined to comment about the specific chemicals because of proprietary concerns. He says the findings have been patented and the group is working with a commercial company to develop the compounds into a usable insect repellent. One issue that still needs to be resolved: how to develop a formulation of the repellent chemicals that will stay on the skin, rather than quickly evaporating as they do naturally. The hope is to get a product to market within a year or two, he says.

Some of the chemicals researchers identified are believed to be related to stress, Dr. Logan says. Previous research has shown that these particular chemicals could be converted from certain other molecules and this could be as a result of oxidation in the body at times of stress, he says. However, it's not clear if the chemicals observed by the Rothamsted researchers were created in this way, and research is continuing to answer this and other questions.

Dr. Logan suggests that mosquitoes may deem hosts that emit more of these chemicals to be diseased or injured and "not a good quality blood meal." Proteins in the blood are necessary for female mosquitoes to produce fertile eggs, and Dr. Logan says it might be evolutionarily advantageous for mosquitoes to detect and avoid such people.

Other Research
Other research includes an effort by scientists at the University of California, Riverside, who published a paper in the journal Nature last week identifying a recently discovered class of molecules that inhibit fruit flies' and mosquitoes' ability to detect carbon dioxide. Mosquitoes can detect carbon dioxide emissions from long ranges, so turning off the ability to detect the gas, perhaps by releasing the inhibiting molecules into the environment, may be a way of keeping the bugs at bay, the researchers suggest. Another team, at the Monell Chemical Senses Centre, is launching a study into whether the taste of human skin and blood are related to the insects' interest in biting certain individuals.

Royal seal impression found in Jerusalem

A large building that dates to the time of the First and Second Temples, in which there was an amazing wealth of inscriptions, was discovered in a salvage excavation conducted by Zubair Adawi, on behalf of the Israel Antiquities Authority, in the village of Umm Tuba in southern Jerusalem (between Zur Baher and the Har Homa quarter), prior to construction work by a private contractor.

Considering the limited area of the excavation and the rural nature of the structure that was revealed, the excavators were surprised to discover in it so many royal seal impressions that date to the reign of Hezekiah, King of Judah (end of the eighth century BCE). Four “LMLK” type impressions were discovered on handles of large jars that were used to store wine and oil in royal administrative centers. These were found together with the seal impressions of two high ranking officials named Ahimelekh ben Amadyahu and Yehokhil ben Shahar, who served in the kingdom’s government. The Yehokhil seal was stamped on one of the LMLK impressions before the jar was fired in a kiln and this is a very rare instance in which two such impressions appear together on a single handle.

Another Hebrew inscription, 600 years later than the seal impressions of the Kingdom of Judah, was discovered on a fragment of a jar neck that dates to the Hasmonean period. An alphabetic sequence was engraved with a thin iron stylus below the vessel’s rim in Hebrew script that is characteristic of the beginning of the Hasmonean period (end of the second century BCE). The letters hay to yod and a small part of the letter kaf were preserved on the shard. Similar inscriptions bearing alphabetic sequences were discovered in the past, usually on ostraca (inscriptions written in ink on pottery shards) or engraved on ossuaries (stone receptacles in which human bones were buried). The alphabetic inscription that was discovered in this instance is unique and the significance of it requires further study: was this a “writing exercise” done by an apprentice scribe or should we ascribe to it some magical importance?

The remains of the large building included several rooms arranged around a courtyard. Pits, agricultural installations and subterranean silos were hewn inside the courtyard. A potter’s kiln, a large columbarium cave in which there is a rock-hewn hiding refuge, pottery vessels, etc were also discovered inside the built complex. The pottery vessels that were recovered from the ruins of the building indicate it first dates to the end of the Iron Age (the First Temple period) in the eighth century BCE. Following its destruction, along with Jerusalem and all of Judah during the Babylonian conquest, Jews reoccupied it in the Hasmonean period (second century BCE) and it existed for another two hundred years until the destruction of the Second Temple. During the Byzantine period the place was reinhabited as part of the extensive rural settlement of monasteries and farmsteads in the region between Jerusalem and Bethlehem.

Some three years ago the impressive remains of a monastery from this period were excavated that together with the remains of the current excavation confirm the identification of the place as “Metofa”, which is mentioned in the writings of the church fathers in the Byzantine period. The name of the Arab village, “Umm Tuba” is therefore a derivation of Byzantine “Metofa”, which is Biblical “Netofa” and is mentioned as the place from which two of David’s heroes originated (2 Samuel 23:28-29).