Sunday, March 14, 2010

The Mysterious Sailing Stones of Death Valley

It is one big mystery that a stone that weighs more or less like a man can move on its own. This has become quite a puzzle for the past decade. The mysterious sailing stones of Death Valley have been discovered to slide over valleys that people do not live in. These valleys are filled with dry cracking muddy ground during summer and ice during winter. Many geologists have gone to all the places in Racetrack Playa and its surrounding.
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The mysterious sailing stones of Death Valley slide on very smooth ground and leave a trail behind. Some geologists came up with the conclusion that the mysterious sailing stones of death valley move through the smooth ground when the mud is wet and the stones have little ice droplets on them with the help of the wind. This is however not entirely true because the stones move during the summer when the temperature is too high and even dries the stones themselves.The mysterious sailing stones of Death Valley not only slide on smooth ground but dig and leave shallow track in their wake.
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The mysterious sailing stones of Death Valley are a magnificent phenomenon in the sense that they can take different turns around each other. This is mind challenging because the mysterious sailing stones of Death Valley start moving in a parallel direction.
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As the years proceed, each stone takes its own different path. Some stones make linear turns others make oval turns while others create a wavy shape on their tracks. No one has ever seen them move and nobody knows the speed they move with. The mysterious sailing stones of Death Valley turn while they are sliding through the flat leveled valley and this leaves different tracks behind them. Some stones move further than others over two to five years.

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The future of medicine has arrived

For the first time, the genetic cause of a disease has been revealed by sequencing the patient's genome. The consequences, says Jeremy Laurance, could be enormous.
Doctors hailed a landmark in the advance of personalised medicine yesterday with the first case in which the sequencing of a patient's complete genome revealed the genetic cause of his disease.
The advance demonstrates for the first time that the technology of gene sequencing, touted as the future of medicine for a decade, is robust enough to yield clinically significant results. Fewer than 10 people in the world have had their personal genomes completed, and most of these were done as an intellectual exercise.
But the technology may herald a new era of medical neurosis rather than a new dawn of better health. Learning in advance of the risk of suffering diseases in the future might help prevent their occurrence, but would also lead to a lifetime spent worrying about them.
The latest advance solves a 20-year puzzle for the patient, James Lupski, who as vice chairman of molecular and human genetics at Baylor College of Medicine in Houston, Texas, also led the research.
Dr Lupski inherited a rare condition which affects the nerves in the hands and feet called Charcot-Marie-Tooth syndrome from his parents. In 1991 he and his team identified the first genetic mutation that gave rise to the disease and 40 more genes have since been implicated by other researchers. But none of them accounted for the disorder that affects Dr Lupski himself and some of his siblings.
To help Dr Lupski in his quest, Richard Gibbs, director of the Human Genome Sequencing Centre, offered to sequence all of his genome. The researchers found two "compelling" mutations in the gene SH3TC2, among those known to be implicated in the syndrome, which caused the condition in him. The results are published in the New England Journal of Medicine (NEJM).
Dr Lupski said he had known he had a genetic disease for 40 years, but now he knew the gene at fault. "This is the first time we have tried to identify a disease gene in this way. Currently we only know the function of 5 to 10 per cent of the approximately 25,000 genes in our genome that it takes to make a human being. What this paper tells us is that the data are robust enough that we can start to use it to interpret clinical information in the context of the genome sequence," he said.
Unlocking the secrets of the genetic code for individuals to reveal their risk of developing specific diseases has been limited by the high cost. But it is falling dramatically. Decoding the complete genome of Nobel prize winner James Watson, joint discoverer of the double helix structure of DNA, in 2008, cost $1 million (£600,000). Dr Lupski's genome was sequenced for $50,000 (£30,000). An editorial in the NEJM says the "spectacular" reductions in cost will continue, as a result of competition and innovation, and will be "at most one tenth of the current cost" within two years. Even today, using a different technique that shrinks the target for sequencing (covering 1 per cent of the genome but which still accounts for 90 per cent of all mutations with large effects), the cost of decoding Dr Lupski's genome could have been achieved for $4,000 (£2,800). "It is increasingly clear that the cost is fast approaching a threshold at which DNA sequencing will become a routine part of the diagnostic armamentarium," the journal says.

However, the new developments raise a host of ethical questions. Among them is how information about genetic risks of disease should be presented to individuals, and what the implications may be for insurance and employment.
Women affected by the genes BRCA1 and 2, which are known to raise the lifetime risk of breast cancer to 80 per cent, can protect themselves by having regular mammograms or by opting for prophylactic surgery to remove the breasts.

But for Huntingdon's disease, an inherited progressive neurodegenerative disorder, there is no cure. Alerting people affected by the gene that causes the disease means they live for longer under its cloud. While some may prefer to know, others may want to live in ignorance, until their symptoms develop. Couples trying for a child may wish to know if the foetus is affected so they can opt for abortion if they choose.

The Association of British Insurers agreed a moratorium on the use of genetic test results in 2001, which has twice been extended and is now due to expire in 2014.

The moratorium allows consumers to obtain insurance for themselves and their families without having to disclose adverse results of predictive genetic tests that might indicate a risk of serious disease in the future.

Single gene mutations that cause more than 2,000 mostly rare diseases have been identified so far. Mutations in multiple genes that increase the risk of common diseases are also being discovered.
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Even in Old Age, Men Want Sex More Than Women Do

Spring is coming, and a young man's thoughts turn to ... you know. Apparently, old men's thoughts turn to the same subject. According to an article to be published Wednesday in the British Medical Journal, 67% of men ages 65 to 74 said they had been sexually active in the past year, compared with just 40% of women in that age group. Everyone knows young men think constantly about sex, but many guys remain interested in sex until they are almost dead: more than one-third of men ages 75 to 85 said they had sex in the past 12 months, compared with just 17% of women in that age group.
Some of this surely has to do with Viagra, which makes it easier for older men to be interested in sex. But the disparity in sexual activity between older men and older women isn't entirely explained by the 1998 release of the little blue pill. One set of data presented in the new paper — taken from the National Survey of Midlife Development, involving about 3,000 adults ages 25 to 74 — was collected in 1995 and 1996. That data set shows that 62% of men ages 65 to 74 reported sexual activity in the previous six months; only 36% of women in the same age group did so. (See pictures of couples married for 50 years or more.)
These differences matter because having a healthy sex life is strongly associated with having a healthy life, period — and also a longer life. Scientists aren't sure about the causal relationship here. Sexually active people tend to be healthier, and healthier people tend to be sexually active. It could be that the fulfillment of sex gives you a health boost, or that being more fit makes sex better — or, more likely, it's a little of both.
What we do know, from this new paper, is that if you are a 30-year-old male, you can be expected to have sex for 35 more years. The authors — Dr. Stacy Tessler Lindau and researcher Natalia Gavrilova of the University of Chicago — call this measure your "sexually active life expectancy," or SALE. A 30-year-old woman has a SALE of just 31 more years. (The study also finds that men and women who stay healthy and in good shape gain extra years of sexually active life in older age, compared with their peers in poorer health.) But women live about five years longer than men, so when you do the math, all this means that women go approximately twice as long without sex as men before they die. (See TIME's sex covers.)
Older women also enjoy the sex they do have far less than older men. Married women ages 57 to 64 who haven't been divorced or widowed report having about as much sex as married men in the same age group. But while 77% of partnered men in that age group say they are interested in sex, only 36% of partnered women report the same interest. These figures suggest that a lot of older women may be having sex when they don't really want to. (Comment on this story.)
Lindau, the lead author on the paper, is cautious about drawing strong conclusions from this variance. "It may be that women are more likely to have sex for reasons other than fulfilling pleasure — or that they are more interested in giving a partner satisfaction," she says. "Maybe they lack the agency, or maybe they feel marital duty, but our paper doesn't provide an explanation." (See how to prevent illness at any age.)
It's a shortcoming in the paper that the journal itself notes: in a British Medical Journal editorial accompanying the paper, Texas A&M University professor Patricia Goodson says that while Lindau and Gavrilova's new SALE measure might someday prove a useful tool for gauging an aging population's medical and public-health needs as they relate to sex, it "sheds no light on the intriguing — and still poorly understood — question of why, even though they enjoy fewer years of sexually active life, many women do not perceive this as a 'problem.' " (See pictures of longevity around the world.)
Another problem the editorial doesn't mention: the paper is based on self-reported data, and although the authors note that self-reported information about health is usually highly consistent with objective health data, reports of actual sexual activity simply cannot be objectively measured. Even so, the paper does confirm a large difference in sexual interest among older men and older women.
The reasons for the male-female sex disparity among the elderly may not be clear, but the paper shows that the problem in sex quality seems to worsen with age. Still, there is a silver lining for older women having bad or unwanted sex: men tend to die younger than women. Also, it is men's increasing physical and health problems that are most commonly cited (by both men and women) as the reason sexual activity declines later in life. (See a story about elder porn in Japan.)
The new paper raises more questions than it answers. When interviewed, Lindau avoids making any sweeping social commentary. Instead, she notes that as a gynecologist, she gets a lot of questions from older patients about whether their level of sexual activity is normal. "And I haven't had the data to give these women answers," she says. The new paper is a start.
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Friday, March 05, 2010

LOST SYMBOL OF RA

Part 1

Part 2

Wayne Herschel - author of The Hidden Records - Ancient knowledge discovered in pyramid star maps in Egypt and Tikal matching monument layout patterns found at Stonehenge and sites all around the world and on Mars. The Key of Solomon parchment deciphered leads to two more star maps... the Vatican city and Washington DC city layout patterns and more... all outline another star system of the 'gods' near the Pleiades... our human ancestors.

Wayne reveals his source of all the lost records... it came from a paranormal event where he believes he had an encounter with The Cosmic Tree of Life... God. The secret of the Soul and the design of the universe revealed, backed by 20 years' research proving his event, starting the Oneism quest.

Websites:

http://www.thehiddenrecords...
http://www.keyofsolomon.net
http://www.oneism.org

Film makers and Radio stations interested please contact Wayne at thrbooks at gmail dot com.
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Tuesday, March 02, 2010

The ancient Nasca lines of Peru shed their secrets


Nasca

Spirits in the Sand
The ancient Nasca lines of Peru shed their secrets.


By Stephen S. Hall
Photograph by Robert Clark


From the air, the lines etched in the floor of the desert were hard to see, like drawings left in the sun too long. As our pilot cut tight turns over a desert plateau in southern Peru, north of the town of Nasca, I could just make out a succession of beautifully crafted figures.

Staring out from a hillside, a hundred-foot-tall, owl-eyed figure may have been made by the Paracas people, who occupied the region before the Nasca. 
  
"Orca!" shouted Johny Isla, a Peruvian archaeologist, over the roar of the engine. He pointed down at the form of a killer whale. "¡Mono!" he said moments later, when the famous Nasca monkey came into view. “¡Colibrí!” The hummingbird.

 This depiction of a giant bird, with a long, pointed beak and wings spanning 220 feet, may evoke tiny hummingbirds that flitted through irrigated fields
 
Since they became widely known in the late 1920s, when commercial air travel was introduced between Lima and the southern Peruvian city of Arequipa, the mysterious desert drawings known as the Nasca lines have puzzled archaeologists, anthropologists, and anyone fascinated by ancient cultures in the Americas. For just as long, waves of scientists—and amateurs—have inflicted various interpretations on the lines, as if they were the world's largest set of Rorschach inkblots. At one time or another, they have been explained as Inca roads, irrigation plans, images to be appreciated from primitive hot-air balloons, and, most laughably, landing strips for alien spacecraft.

Stones found in a ceremonial site at Cahuachi were
used to grind pigments for painting the great pyramid. 

 
After World War II a German-born teacher named Maria Reiche made the first formal surveys of the lines and figures—called geoglyphs—outside Nasca and the nearby town of Palpa. For half a century, until her death in 1998, Reiche played a critically important role in conserving the geoglyphs. But her own preferred theory—that the lines represented settings on an astronomical calendar—has also been largely discredited. The ferocity with which she protected the lines from outsiders has been adopted by their caretakers today, so that even scientists have a hard time gaining access to the most famous animal figures on the plain, or pampa, immediately northwest of Nasca.

Since 1997, however, a large Peruvian-German research collaboration has been under way near the town of Palpa, farther to the north. Directed by Isla and Markus Reindel of the German Archaeological Institute, the Nasca-Palpa Project has mounted a systematic, multidisciplinary study of the ancient people of the region, starting with where and how the Nas­ca lived, why they disappeared, and what was the meaning of the strange designs they left behind in the desert sand.

 Likely a token of fertility, a severed head from Cahuachi hung from a rope of vegetable fiber. The victim may have been a local man sacrificed at a time of drought.
(Severed head composed of three images)
 
As our plane banked into another turn, Isla, a native of the highlands who works at the Andean Institute of Archaeological Studies, kept his broad, high-cheeked face pressed to the window. "Trapezoid!" he shouted, pointing out a huge geometrical clearing looming into sight. "Platform!" he added, gesturing with his finger. "Platform!"

Platform? He was pointing at a small heap of stones at one end of the trapezoid. If Isla and his colleagues are right, such unprepossessing structures may hold a key to understanding the true purpose of the Nasca lines. The story begins, and ends, with water.

 Many buried corpses, including that of a man found at Ullujaya, were mummified naturally by the region's arid climate.
  
The coastal region of southern Peru and northern Chile is one of the driest places on Earth. In the small, protected basin where the Nasca culture arose, ten rivers descend from the Andes, to the east, most of them dry at least part of the year. These ten fragile ribbons of green, surrounded by a thousand shades of brown, offered a fertile hot spot for the emergence of an early civilization, much as the Nile Delta or the rivers of Mesopotamia did. "It was the perfect place for human settlement, because it had water," says geographer Bernhard Eitel, a member of the Nasca-Palpa Project. "But it was a high-risk environment—a very high-risk environment."

A skull from Carrizales shows a typical form of deliberate shaping,
perhaps a sign of elite social status. 

  
According to Eitel and his University of Heidelberg colleague Bertil Mächtle, the micro­climate in the Nasca region has oscillated dramatically over the past 5,000 years. When a high-pressure system over central South America called the Bolivian High moves to the north, more rain falls on the western slopes of the Andes. When the high shifts southward, precipitation decreases, and the rivers in the Nasca valleys run dry.

Despite the risky conditions, the Nasca flourished for eight centuries. Around 200 B.C., the Nasca people emerged out of a previous culture known as the Paracas, settling along the river valleys and cultivating crops such as cotton, beans, tubers, lucuma (a fruit), and a short-eared form of corn. Renowned for their distinctive pottery, they invented a new technique of mixing about a dozen different mineral pigments in a thin wash of clay so that colors could be baked into the pottery. A famous ceramic tableau known as the Tello plaque—showing several Nasca strolling while blowing their panpipes, surrounded by dancing dogs—has been viewed as an iconic snapshot of a peaceful people whose rituals embraced music, dance, and sacred walks.
The theocratic capital of early Nasca times was a sand-swept mecca called Cahuachi.

 A scarlet macaw, purportedly unearthed from a Nasca cemetery at Carrizales, kept its colors as it dried naturally in the region's hot, dry soil. Imported live from the Amazon rain forest far to the east, it was most probably kept as a pet and perhaps eventually buried with its owner.

The site, first excavated in the 1950s by Columbia University archaeologist William Duncan Strong, is a vast, 370-acre complex featuring an imposing adobe pyramid, several large temples, broad plazas and platforms, and an intricate network of connecting staircases and corridors. In their 2003 book on Nasca irrigation systems, archaeologist Katharina Schreiber of the University of California, Santa Barbara, and Josué Lancho Rojas, a local schoolmaster and historian, point out that the Nasca River, which goes underground about nine miles to the east, resurfaces like a spring on the doorstep of Cahuachi. "The emergence of water at this point," they write, "was almost certainly regarded as sacred in prehistoric times."

"Cahuachi was a ceremonial center," says Giuseppe Orefici, an Italian archaeologist who has led the excavation for many years. "People came here from the mountains and from the coast, bringing offerings." Among the artifacts unearthed were dozens of severed heads, typically with a braided rope strung through a hole drilled in the forehead, perhaps to allow the skull to be worn around the waist.

 One of the tallest sand dunes in the world, Cerro Blanco rises from the desert to more than 6,800 feet above sea level. The Nasca people believed it was a source of water, a notion that continues today. Local residents say there's a lake in the middle of the dune, and some make pilgrimages to the top to leave offerings of pottery, just as the Nasca people did more than 1,300 years ago.
  
Elsewhere in the Nasca realm, people moved east or west along the river valleys as rainfall patterns shifted. The Peru-German archaeological initiative has explored the region from the Pacific coast to altitudes of nearly 15,000 feet in the Andean highlands. Almost everywhere they have looked they have found evidence of Nasca villages—"like pearls in the valley margins," says Reindel. "And near every settlement we find geoglyphs."

The parched desert and hillsides made an inviting canvas: By simply removing a layer of dark stones cluttering the ground, exposing the lighter sand beneath, the Nasca created markings that have endured for centuries in the dry climate. Archaeologists believe both the construction and maintenance of the lines were communal activities—"like building a cathedral," says Reindel.

 Ripped from its tomb, a skull bears witness to the damage looters did to a cemetery at Tunga while searching for gold, textiles, and intact pottery. Such illegal excavations, rampant in Peru, destroy evidence that could help explain lingering mysteries about the Nasca culture.
  
In the hyperarid southern valleys, early Nasca engineers may have also devised a more practical way of coping with the scarcity of water. An ingenious system of horizontal wells, tapping into the sloping water table as it descends from the Andean foothills, allowed settlements to bring subterranean water to the surface. Known as puquios, these irrigation systems still water the southern valleys.

Perhaps because of the adversity they faced, the Nasca people seem to have been remarkably "green." The creation of the puquios displayed a sophisticated sense of water conservation, since the underground aqueducts minimized evaporation. The farmers planted seeds by making a single hole in the ground rather than plowing, thus preserving the substructure of the soil. During a visit to a Nasca site called La Muña, Isla pointed out layers of vegetative matter in the walls of buildings and terraces that marked the rocky hillside settlement. The Nasca, he said, recycled their garbage as building material. "It's a society that managed its resources very well," he said. "This is what Nasca is all about."

 Beneath the guiding hand of archaeologist Alberto Urbano, a snaking path traces an enigmatic figure that was meant to be walked on, as apparently were all the Nasca lines. 
  
To most people today, Nasca is all about the lines. But although the Nasca were certainly the most prolific makers of geoglyphs, they were not the first. On a hillside abutting a plateau south of Palpa sprawl three stylized human figures, with buggy eyes and bizarre rays of hair, that date to at least 2,400 years ago—earlier than almost any textbook date for the start of the Nas­ca civilization. Reindel's group has attributed no fewer than 75 groups of geoglyphs in the Palpa area to the earlier Paracas culture. These Paracas geoglyphs, which often depict stylized humanlike figures, in turn share distinct visual motifs with even earlier images carved in stone, known as petroglyphs. During a recent foot survey of a suspected Paracas site high in the Palpa River Valley, Isla came across a petroglyph of a monkey—a surprising, earlier incarnation of the famous Nasca geoglyph he had pointed out to me on the pampa below our plane.

These new findings make an important point about the Nasca lines: They were not made at one time, in one place, for one purpose. Many have been superimposed on older ones, with erasures and overwritings complicating their interpretation; archaeologist Helaine Silverman once likened them to the scribbling on a blackboard at the end of a busy day at school. The popular notion that they can be seen only from the air is a modern myth. The early Paracas-era geoglyphs were placed on hillsides where they could be seen from the pampa. By early Nasca times the images—less anthropomorphic, more naturalistic—had migrated from the nearby slopes to the floor of the pampa. Almost all of these iconic animal figures, such as the spider and the hummingbird, were single-line drawings; a person could step into them at one point and exit at another without ever crossing a line, suggesting to archaeologists that at some point in early Nasca times the lines evolved from mere images to pathways for ceremonial processions.

Later, possibly in response to explosive population growth documented by the German-Peruvian team, more people may have participated in these rituals, and the geoglyphs took on open, geometrical patterns, with some trapezoids stretching more than 2,000 feet. "Our idea," Reindel says, "is that they weren't meant as images to be seen anymore, but stages to be walked upon, to be used for religious ceremonies."

A revered huarango tree sprouts above a human face on this jar from La Tiza. Found in a tomb beside a decapitated body, the vessel may have served as a proxy for a head severed in a sacrifice. 

Those ancient acts of worship have left their traces in the ground itself. Between 2003 and 2007 Tomasz Gorka and Jörg Fassbinder, geophysicists at the Bavarian State Department of Monuments and Sites, took measurements of the Earth's magnetic field on a trapezoid near Yunama, a village outside Palpa, and on other lines nearby. Subtle perturbations in the magnetic signal indicated that the soil had been compacted by human activity, especially around the platforms. Karsten Lambers, another member of the Nasca-Palpa Project, had meanwhile collected positional data and precise measurements of sight lines across hundreds of geoglyphs. The data showed that the trapezoids and other geometric shapes were constructed where they would be visible from a number of vantage points. The team concluded that they were places where "social groups acted and interacted, and spectators in the valleys and on other geoglyph sites were able to watch and observe."

Clutching what appears to be a bowl of peanuts, a ceramic monkey found at the ceremonial site of Cahuachi may represent a type of pet kept by the Nasca elite. Trade along the Pacific coast of South America probably brought white-fronted capuchin monkeys, spider monkeys, and brown woolly monkeys into Nasca territory from the tropical forests of what is now Ecuador.
One such primate took on mythical dimensions as the subject of a design more than 300 feet in diameter inscribed on the desert floor. 

  
Cerro Blanco, among the tallest sand dunes in the world, rises pale and stark out of the surrounding bowl of sere Andean foothills, dominating the physical and spiritual landscape of the southern Nasca valleys. For centuries the Andean people have worshipped deities embodied in mountains such as Cerro Blanco. According to Johan Rein­hard, a National Geographic explorer-in-residence, the mountains have traditionally been associated—mythologically, if not geologically—with water sources. The Nas­ca potsherds littering the path to the summit of Cerro Blanco would suggest the connection runs deep into the past.

Spiders on a pot may have been symbols of agricultural bounty. Emerging before a rain, such creatures would have been welcome harbingers of an event that was crucial to survival. 
  
In 1986 Reinhard reported finding ruins of a ceremonial stone circle at the summit of Illakata, at over 14,000 feet one of the tallest mountains feeding runoff to the Nasca drainage system. Along with other traces of ritual activity at the top of Nasca watersheds, the discovery led him to propose that one of the main purposes of the Nasca lines was related to the worship of mountain deities, including Cerro Blanco, because of their connection to water.

Recent research has bolstered the hypothesis. In the highlands farther north, where wild vicu�as wander near the headwaters of the Palpa River, I joined Reindel and his team on a scramble to the top of a sacred mountain known locally as Apu Llamoca. (In the indigenous language, apu is the word for "deity.") At the summit of this dark volcanic dike, Reindel showed me a worship circle with ceramic potsherds the team had found in 2008 and nearby, a semicircular structure almost exactly like the one Reinhard had reported finding on Illakata.

At a distance Urbano paces the width of a trapezoid that cuts through the continuous swirls. 
  
For the Nasca-Palpa Project researchers, however, the real epiphany connecting Nasca sacred rituals to water worship occurred in 2000, on the trapezoid that dominates the desolate plateau near the village of Yunama. The archaeologists had frequently noticed large, man-made mounds of stones at the end of such trapezoids, which they suspected were ceremonial altars. As Reindel excavated his way through one mound, uncovering smashed potsherds, crayfish shells, vegetable remains, and other relics that clearly represented ritual offerings, he came upon fragments of a large seashell of the genus Spondylus, distinctive for its creamy, coral-like hues and spiky outer surface. It appears in the coastal waters off northern Peru only during El Ni�o events and is thus associated with the arrival of rainfall and agricultural fertility.

 Since the Nasca lines became widely known in the late 1920s, waves of scientists—and amateurs—have inflicted various interpretations on the desert drawings,
as if they were the world's largest set of Rorschach inkblots.

  
"The Spondylus shell is one of the few items of Andean archaeology that has been well studied," Reindel says. "It's a very important religious symbol for water and fertility. Like incense in the Old World, it was brought from far away and is found in specific contexts, such as funerary objects and on these platforms. It was connected in certain activities to praying for water. And it's clear," he adds, "in this area, water was the key issue."

Ultimately, all those offerings and prayers went unanswered. In 2004, at a site called La Tiza in the southern Nasca region, overlooking the dry Aja River, archaeologist Christina Conlee made a grim discovery while excavating a Nasca tomb. The first part of the skeleton to emerge from the dirt was not the skull, but the neck bones. "We could see the vertebrae sitting on top," Conlee told me. "The person was seated, with arms crossed and legs crossed, and no head."

 At one time or another, they have been explained as Inca roads, irrigation plans, images to be appreciated from primitive hot-air balloons, and, most laughably, landing strips for alien spacecraft.
  
Cut marks on the protruding neck bones probably indicate the head had been severed by a sharp obsidian knife. Underscoring the point, a ceramic pot known as a head jar rested against the elbow of the skeleton; it depicted a typically decapitated "trophy head," out of which grew an eerie, Halloween-like tree trunk with eyes. According to Donald Proulx, an expert on Nasca pottery and professor emeritus at the University of Massachusetts Amherst, the style of the jar suggests a tentative date of A.D. 325 to 450.

Everything about the burial—the posture of the skeleton, the head jar, and the posture of the body—indicates a deliberate, respectful interment. "You're not going to do that with your enemy," said Conlee, a researcher at Texas State University. Isotope analysis of the young man's bones make clear that he had lived in the immediate vicinity and was thus a local person rather than a foreign enemy captured in war. Conlee suspects the skeleton represents a ritual sacrifice. "Although we find trophy heads spread throughout the Nasca period," she said, "there are some indications that they became more common in the middle and late period, and also at times of great environmental stress, perhaps drought. If this was a sacrifice, it was made to appease the gods, perhaps because of a drought or crop failure."

There is little question that water—or more precisely, its absence—had assumed paramount importance by the endgame of the Nasca culture, roughly between A.D. 500 and 600. In the Palpa area, geophysicists have traced the creep of the eastern margin of the desert about 12 miles up the valleys between 200 B.C. and A.D. 600, reaching an altitude of some 6,500 feet. Similarly, the population centers in the river oases around Palpa moved farther up the valleys, as if they were trying to outrun the arid conditions. "At the end of the sixth century A.D.," Eitel and Mächtle conclude in a recent paper, "the aridity culminated and the Nasca society collapsed." By A.D. 650, the more militaristic Wari (Huari) Empire, which expanded from its base in the central highlands, had supplanted the Nas­ca in the southern desert region.

 After this religious center fell, for reasons still debated by experts,
the Nasca began to build wells to tap deep aquifers flush with mountain rainwater.

   
"It wasn't just climate conditions that caused the collapse of the early Nasca culture at Cahuachi, and we can say the same thing for the end of Nasca culture in general," Johny Isla told me. "A state of crisis was provoked because water was more prevalent in some valleys than in others, and the leaders of different valleys may have been in conflict."

The legacy of the Nasca lives on in the lines, of course, and although most people come to admire them from the air, what I'd seen and heard convinced me that you can't truly understand the geoglyphs unless you experience them at ground level. In one conversation, Isla had described to me the sensation of walking upon those sacred paths. "You can feel it," he said. Curious about that feeling, I asked him if we could walk several lines on the Cresta de Sacramento, a small ridge north of the town of Palpa.

 To settle the dust at the site of Cantayoc, a worker wets down the path that tourists take to explore one of the ancient entrances to a puquio—a network of wells, linked by stone-lined tunnels, that the Nasca constructed to tap an aquifer that still provides water to local communities.
   
We met at dawn on a winter morning in August, with fog streaming through the valley below us and the sun still trapped behind the Andean foothills to the east. As we picked our way across a large trapezoid on the floor of the desert plateau, Isla cautioned me to walk carefully and tended to the sacred landscape like a groundskeeper, tamping disturbed stones back into place as if they were golf divots. After several minutes of an odd tiptoeing hike, we found ourselves standing in the lanes of an ancient spiral—another common form of Nasca geoglyph.

As we walked around the path of the spiral, my feet naturally drew me face-to-face with every point in the compass of the surroundings: the Palpa Valley to the south, the coastal mountains to the west, the local "sacred mountain" (Cerro Pinchango) to the north, and to the east, the foothills of the Andes, with their godlike power to feed the fragile rivers that curl through the Nasca drainage, watering the seeds of civilization sown in this otherwise arid environment. If I had stepped into the vortex of this curving itinerary in ancient times, I would also have been compelled to face my fellow worshippers walking the same path. Such a Nasca prayer walk, I realized, would have reinforced both sacred and social relationships.

"Look!" Isla suddenly exclaimed. The sun had risen above the foothills, and the slanting morning light was projecting our long shadows across the geoglyph. The spiral fairly hovered above the landscape, its boundaries of piled rock etched in sharp relief.

 Near Cerro Blanco a desiccated huarango stands as a reminder of the groves that once offered cooling shade. Some scientists now believe the Nasca made the land drier by clearing it for farming.
   
As my footsteps continued around the curves of the spiral, it occurred to me that one of the most important functions of the "mysterious" Nasca lines is no mystery at all. The geoglyphs surely provided a kinetic, ritualistic reminder to the Nasca people that their fate was tied to their environment—its natural beauty, its ephemeral abundance, and its life-threatening austerity. You can read their reverence for nature, in times of plenty and in times of desperate want, in every line and curve they scratched onto the desert floor. When your feet inhabit their sacred space, even for a brief and humbling moment, you can feel it. 

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