Category: Anthropology


May 01, 2013 6:01 PM
The four cuts at the top of this skull "are clear chops to the forehead," says Smithsonian forensic anthropologist Douglas Owsley. Based on forensic evidence, researchers think the blows were made after the person died.

The four cuts at the top of this skull “are clear chops to the forehead,” says Smithsonian forensic anthropologist Douglas Owsley. Based on forensic evidence, researchers think the blows were made after the person died.

Donald E. Hurlbert/Smithsonian

“First they ate their horses, and then fed upon their dogs and cats, as well as rats, mice and snakes.”

So says James Horn of the historical group , paraphrasing an account by colony leader George Percy of what conditions were like for the hundreds of men and women stranded in Jamestown, Va., with little food in the dead of winter in 1609.

They even ate their shoes. And, apparently, at least one person.

Scientists who have recovered human bones from the English colony at Jamestown announced Wednesday that they show the marks of cannibalism.

It’s long been debated whether the colonists resorted to eating each other during “the starving time” of 1609 to 1610. The weather was harsh, and the hostile Indians were even harsher. Only 60 colonists survived that winter. This new finding would be the first hard evidence of cannibalism.

Last summer, Jamestown’s chief archaeologist, , dug up a human skull and a few other bones, along with some food remains. But these bones were different from others he’d found.

This forensic facial reconstruction shows what the 14-year-old, nicknamed "Jane," may have looked like. Scientists say the remains found at Jamestown are evidence of cannibalism over the winter of 1609-1610.

This forensic facial reconstruction shows what the 14-year-old, nicknamed “Jane,” may have looked like. Scientists say the remains found at Jamestown are evidence of cannibalism over the winter of 1609-1610.

Donald E. Hurlbert/Smithsonian

“The damage to the skull, and finding it with the other food remains, brought on serious thoughts that this was, indeed, evidence of survival cannibalism,” Kelso says.

Kelso took the bones to the Smithsonian’s Douglas Owsley, a renowned forensic anthropologist who has solved numerous criminal cases, as well as archaeological mysteries, based on human bones. Owsley determined that the Jamestown bones belonged to a girl, aged 14. They don’t know anything about her, but have given her a name: Jane.

Owsley found numerous cut marks on the cranium and jaw, all apparently done after the girl had died. “There are clear chops to the forehead. They are very closely spaced,” Owsley says.

 

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Graph modified after Verisimilus

The graph shows the percentage of marine animals becoming extinct. The five major events are:

Ordovician-Silurian, Late Devonian, Permo-Triassic, Triassic-Jurassic and Cretaceous-Paleogene.

Image Source

 

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March 23, 2013

Is Earth Undergoing a 6th Mass Extinction? –”99.9% of all Past Species Extinct”

 

 

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Of all species that have existed on Earth, 99.9 percent are now extinct. Many of them perished in five cataclysmic events. The classical “Big Five” mass extinctions identified by Raup and Sepkoski are widely agreed upon as some of the most significant: End Ordovician, Late Devonian, End Permian, End Triassic, and End Cretaceous. According to a recent poll, seven out of ten biologists think we are currently in the throes of a sixth mass extinction. Some say it could wipe out as many as 90 percent of all species living today. Other scientists dispute such dire projections.

“If you look at the fossil record, it is just littered with dead bodies from past catastrophes,” observes University of Washington paleontologist Peter Ward. Ward says that only one extinction in Earth’s past was caused by an asteroid impact – the event 65 million years ago that ended the age of the dinosaurs. All the rest, he claims, were caused by global warming.

Ward’s study, Under a Green Sky, explores extinctions in Earth’s past and predicts extinctions to come in the future. Ward demonstrates that the ancient past is not just of academic concern. Everyone has heard about how an asteroid did in the dinosaurs, and NASA and other agencies now track Near Earth objects.

Unfortunately, we may not be protecting ourselves against the likeliest cause of our species’ demise. Ward explains how those extinctions happened, and then applies those chilling lessons to the modern day: expect drought, superstorms, poison–belching oceans, mass extinction of much life, and sickly green skies.

The significant points Ward stresses are geologically rapid climate change has been the underlying cause of most great “extinction” events. Those events have been, observed Harvard evolutionary biologist Stephen Gould, major drivers of evolution.

Drastic climate change has not always been gradual; there is solid empirical evidence of catastrophic warming events taking place in centuries, perhaps even decades. The impact of atmospheric warming is most potent in its modification of ocean chemistry and of circulating currents; warming inevitably leads to non-mixing anoxic dead seas.

We are already in the middle, not the beginning, of an anthropogenic global warming, caused by agriculture and deforestation, which began some 10,000 years ago but which is now accelerating exponentially; though the earliest wave of anthropogenic warming has been stabilizing and beneficial to human development, it appears to have the potential for catastrophic effects within a lifetime or two.

Looking at the ancient evidence, Ward notes that ice caps began to shrink. “Melting all the ice caps causes a 75-meter increase in sea level will remove every coastal city on our planet.” It will also cover earth’s most productive farmland, the author warns, adding, “It will happen if we do not somehow control CO2 rise in the atmosphere.”

An analysis of the geological record of the Earth’s sea level, carried out by scientists at Princeton and Harvard universities supports Ward using a novel statistical approach that reveals the planet’s polar ice sheets are vulnerable to large-scale melting even under moderate global warming scenarios. Such melting would lead to a large and relatively rapid rise in global sea level.

According to the analysis, an additional 2 degrees of global warming could commit the planet to 6 to 9 meters (20 to 30 feet) of long-term sea level rise. This rise would inundate low-lying coastal areas where hundreds of millions of people now reside. It would permanently submerge New Orleans and other parts of southern Louisiana, much of southern Florida and other parts of the U.S. East Coast, much of Bangladesh, and most of the Netherlands, unless unprecedented and expensive coastal protection were undertaken. And while the researchers’ findings indicate that such a rise would likely take centuries to complete, if emissions of greenhouse gases are not abated, the planet could be committed during this century to a level of warming sufficient to trigger this outcome.

 

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Owen Jarus
LiveScience
Wed, 06 Feb 2013 10:01 CST
Sudan Pyramid_1

© Vincent Francigny/SEDAU
Among the discoveries are pyramids with a circle built inside them, cross-braces connecting the circle to the corners of the pyramid. Outside of Sedeinga only one pyramid is known to have been built in this way.

At least 35 small pyramids, along with graves, have been discovered clustered closely together at a site called Sedeinga in Sudan.

Discovered between 2009 and 2012, researchers are surprised at how densely the pyramids are concentrated. In one field season alone, in 2011, the research team discovered 13 pyramids packed into roughly 5,381 square feet (500 square meters), or slightly larger than an NBA basketball court.

They date back around 2,000 years to a time when a kingdom named Kush flourished in Sudan. Kush shared a border with Egypt and, later on, the Roman Empire. The desire of the kingdom’s people to build pyramids was apparently influenced by Egyptian funerary architecture.

At Sedeinga, researchers say, pyramid building continued for centuries. “The density of the pyramids is huge,” said researcher Vincent Francigny, a research associate with the American Museum of Natural History in New York, in an interview with LiveScience.

“Because it lasted for hundreds of years they built more, more, more pyramids and after centuries they started to fill all the spaces that were still available in the necropolis.”

Sudan Pyramid_2

© B-N Chagny, SEDAU/SFDAS
This aerial photo shows a series of pyramids and graves that a team of archaeologists has been exploring at Sedeinga in Sudan. Since 2009 they have discovered at least 35 small pyramids at the site, the largest being 22 feet (7 meters) in width.

Tia Ghose
LiveScience
Wed, 06 Feb 2013 16:00 CST
Jawbone

© Mirjana Roksandic
An ancient hominin jawbone unearthed in a Serbian cave may be more than half a million years old.

Scientists have unearthed a jawbone from an ancient human ancestor in a cave in Serbia.

The jawbone, which may have come from an ancient Homo erectus or a primitive-looking Neanderthal precursor, is more than 397,000 years old, and possibly more than 525,000 years old. The fossil, described today (Feb. 6) in the journal PLOS ONE, is the oldest hominin fossil found in this region of Europe, and may change the view that Neanderthals, our closest extinct human relatives, evolved throughout Europe around that time.

“It comes from an area where we basically don’t have anything that is known and well- published,” said study co-author Mirjana Roksandic, a bioarchaeologist from the University of Winnipeg in Canada. “Now we have something to start constructing a picture of what’s happening in this part of Europe at that time.”

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By Arturo Garcia
Monday, January 28, 2013 8:59 EST
 The Raw Story
A photo of bones and skulls scattered in a cemetery, taken in October. (AFP)

Police questioned a Southern California man after the people who bought his former home found a human skull and bones buried in the backyard, KNBC-TV reported Sunday.

“It’s scary to know,” one neighbor told the station. “You don’t know who that person was, how long they’ve been there.”

The new homeowners made their creepy discovery while digging in the backyard of their Santa Ana, California property. Authorities said the previous owner, Larry T. Dominguez, owned the home for more than 20 years, but had amassed more than 15 liens and judgements on the property. Neighbors described him as a “hoarder” who often had “strangers” living in the house. One neighbor said Dominguez lost the house after failing to make insurance payments.

KCBS-TV reported that the current owners, who were not identified, bought the property from Dominguez after it burned down in 2006. Santa Ana police said the owners were not being questioned in the investigation, and that an anthropologist was scheduled to examine the remains on Monday to determine how long they had been buried.

Watch KNBC’s report on the skull and bones found on the property, aired Sunday, Watch Video Here.

By Agence France-Presse
Tuesday, January 22, 2013 21:10 EST
The Raw Story
This undated handout illustration shows the DNA double helix. (AFP)

Present-day Asians and Native Americans are descended from a group of people who were already in China 40,000 years ago, according to an analysis of fossil DNA published this week.

The genetic analysis showed that the early modern humans in Beijing had already diverged genetically from the ancestors of modern-day Europeans.

The researchers took nuclear and mitochondrial DNA from a leg bone found in the Tianyuan Cave in China in 2003.

Using this, they reconstructed the genetic profile of the leg’s owner, a person who lived at a very interesting time in the history of modern humans, the researchers said in a statement Monday.

“This individual lived during an important evolutionary transition when early modern humans, who shared certain features with earlier forms such as Neanderthals, were replacing Neanderthals and Denisovans, who later became extinct,” said lead author Svante Paabo, of the Max Planck Institute for Evolutionary Anthropology.

 

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Ancient mariners: Did Neanderthals sail to Mediterranean?

Charles Choi
LiveScience
Akrotiri Aetokremnos

© Alan Simmons
Neanderthals or other extinct human lineages may have sailed to the Mediterranean Islands long before previously thought. Here, an excavation at Akrotiri Aetokremnos, a site in Cyprus dating back to about 10,000 B.C. where pygmy hippo fossils were found.

Neanderthals and other extinct human lineages might have been ancient mariners, venturing to the Mediterranean islands thousands of years earlier than previously thought.

This prehistoric seafaring could shed light on the mental capabilities of these lost relatives of modern humans, researchers say.

Scientists had thought the Mediterranean islands were first settled about 9,000 years ago by Neolithic or New Stone Age farmers and shepherds.

“On a lot of Mediterranean islands, you have these amazing remains from classical antiquity to study, so for many years people didn’t even look for older sites,” said archaeologist Alan Simmons at the University of Nevada at Las Vegas.

However, in the last 20 years or so, some evidence has surfaced for a human presence on these islands dating back immediately before the Neolithic.

“There’s still a lot to find in archaeology – you have to keep pushing the envelope in terms of conventional wisdom,” Simmons said.

Neanderthal sailors?

For instance, obsidian from the Aegean island of Melos was uncovered at the mainland Greek coastal site of Franchthi cave in layers that were about 11,000 years old, while excavations on the southern coast of Cyprus revealed stone artifacts about 12,000 years old.

“We found evidence that human hunters may have helped drive pygmy hippos to extinction on Cyprus about 12,000 years ago,” Simmons said. “This suggests that seafarers didn’t need to have already domesticated plants and animals to go to these islands, which is a pretty complex set of tricks – they could have been hunter-gatherers.”

Pygmy Hippo Skull

© Alan Simmons
A pygmy hippo skull found at Akrotiri Aetokremnos, a site in Cyprus dating back to about 10,000 B.C. Evidence suggests human hunters may have driven the animals to extinction on Cyprus.

Recently, research has hinted that seafarers may have made their way out to the Mediterranean islands even earlier, long before the Neolithic, and not only to isles close to the mainland, but to more distant ones as well, such as Crete.

For instance, stone artifacts on the southern Ionian Islands hint at human sites there as early as 110,000 years ago. Investigators have also recovered quartz hand-axs, three-sided picks and stone cleavers from Crete that may date back about 170,000 years ago. The distance of Crete about 100 miles (160 kilometers) from the mainland would have made such a sea voyage no small feat.

The exceedingly old age of these artifacts suggests the seafarers who made them might not even been modern humans, who originated between 100,000 and 200,000 years ago. Instead, they might have been Neanderthals or perhaps even Homo erectus.

“The whole idea of seafaring makes these extinct groups seem more human – they were going out to sea to explore places that were uninhabited,” Simmons told LiveScience.

Dating artifacts

The problem with these ancient finds is determining their exact age. “They’re well beyond the range of radiocarbon dating,” Simmons said. Although researchers can also deduce the ages of artifacts based on the ages of surrounding materials, these artifacts weren’t found in reliable contexts that could indisputably attest to their age, he added.

Although the idea that extinct human lineages possessed such advanced mental capabilities might be controversial, ancient seafaring has been seen elsewhere in the world. For instance, Australia was colonized at least 50,000 years ago, while fossils in Indonesia suggest that an extinct lineage of humans was seafaring as long ago as 1.1 million years.

“If the ancient finds in the Mediterranean can be verified, they will show that Homo erectus or Neanderthals or both had the skills and cognitive ability to build boats and navigate them,” Simmons said.

Simmons detailed this research in the Nov. 16 issue of the journal Science.

Crossroads News : Changes In The World Around Us And Our Place In It

 

 

Anthropology & Climate Change

 

 

Wynne Parry, LiveScience Senior Writer

 

A temple in Tikal, one of the Mayan city states.

A temple in Tikal, one of the Mayan city states.
CREDIT: Zap Ichigo, Shutterstock

The city states of the ancient Mayan empire flourished in southern Mexico and northern Central America for about six centuries. Then, around A.D. 900 Mayan civilization disintegrated.

Two new studies examine the reasons for the collapse of the Mayan culture, finding the Mayans themselves contributed to the downfall of the empire.

Scientists have found that drought played a key role, but the Mayans appear to have exacerbated the problem by cutting down the jungle canopy to make way for cities and crops, according to researchers who used climate-model simulations to see how much deforestation aggravated the drought.

“We’re not saying deforestation explains the entire drought, but it does explain a substantial portion of the overall drying that is thought to have occurred,” said the study’s lead author Benjamin Cook, a climate modeler at Columbia University’s Lamont-Doherty Earth Observatory and the NASA Goddard Institute for Space Studies, in a statement. [Dry and Dying: Images of Drought]

Using climate-model simulations, he and his colleagues examined how much the switch from forest to crops, such as corn, would alter climate. Their results, detailed online in the journal Geophysical Research Letters, suggested that when deforestation was at its maximum, it could account for up to 60 percent of the drying. (The switch from trees to corn reduces the amount of water transferred from the soil to the atmosphere, which reduces rainfall.)

Other recent research takes a more holistic view.

“The ninth-century collapse and abandonment of the Central Maya Lowlands in the Yucatán peninsular region were the result of complex human–environment interactions,” writes this team in a study published Monday (Aug 20) in the journal Proceedings of the National Academy of Sciences.

The team, led by B.L. Turner, a social scientist at Arizona State University, concurs that by clearing the forest, the Mayans may have aggravated a natural drought, which spiked about the time the empire came to an end and population declined dramatically.

But this is just one contributing factor to their demise, Turner and colleagues write, pointing out that the reconfiguration of the landscape may also have led to soil degradation. Other archaeological evidence points to a landscape under stress, for instance, the wood of the sapodilla tree, favored as construction beams, was no longer used at the Tikal and Calakmul sites beginning in A.D. 741. Larger mammals, such as white-tailed deer, appear to have declined at the end of empire.

Social and economic dynamics also contributed. Trade routes shifted from land transit across the Yucatán Peninsula to sea-born ships. This change may have weakened the city states, which were contending with environmental changes. Faced with mounting challenges, the ruling elites, a very small portion of the population, were no longer capable of delivering what was expected of them, and conflict increased.

“The old political and economic structure dominated by semidivine rulers decayed,” the team writes. “Peasants, artisan – craftsmen, and others apparently abandoned their homes and cities to find better economic opportunities elsewhere in the Maya area.”

Follow Wynne Parry on Twitter @Wynne_Parry or LiveScience @livescience. We’re also on Facebook & Google+.

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