Secret History
In the article, recently published in the February issue of Current Anthropology, Frachetti argues that early pastoral nomads grew distinct economies across the steppes and mountains of Eurasia and triggered the formation of some the earliest and most extensive networks of interaction in prehistory. The model for this unique form of interaction, which Frachetti calls "nonuniform" institutional complexity, describes how discrete institutions among small-scale societies significantly impact the evolution of wider-scale political economies and shape the growth of great empires or states.
There, in a gloomy underworld, departed heroes such as Achilles gathered mostly to grouse about their boredom, and await the verdict of the judges of the dead.
"I would rather be a paid servant in a poor man's house and be above ground than king of kings among the dead," said Achilles, the greatest of Greek heroes, commenting on the scenery, according to the ancient poem, The Odyssey. (Tough break for Achilles, but perhaps he was later cheered to learn that Brad Pitt would play him in the 2004 film Troy.)
But for archaeologists, a Greek cave that has sparked comparisons to Hades looks more like heaven. Overlooking a quiet Greek bay, Alepotrypa Cave contains the remains of a Stone Age village, burials, a lake and an amphitheater-sized final chamber that saw blazing rituals take place more than 5,000 years ago. All of it was sealed from the world until modern times, and scholars are only now reporting what lies within.
"What you see there almost cannot be described," says archaeologist Anastasia Papathanasiou of the Greek Ministry of Culture, a director of the Diros Project Team. "There is almost no Neolithic (Stone Age) site like it in Europe, certainly none with so many burials."
The claim, detailed in an article in the online scientific journal PLoS ONE, opens the controversial debate over when and how humans populated the Americas.
The 30 centimeter (12 inches) carving is of a man with a "C" shaped head, three fingers per hand and an oversized phallus.
Walter Neves, an archeologist with the Universidad de Sao Paulo and a member of the team that made the discovery, said the rock carving, or petroglyph, could be part of a "cult of fertility."
The ancient work of art was found in 2009 at Lagoa Santa, in central Brazil some 60 kilometers (35 miles) from Belo Horizonte, the capital of Minas Gerais state.
So far the scientists have uncovered one of the walls of the temple along with numerous graves from the same period, said Hussein Rashid.
Ur is one of ancient Iraq's most fascinating cities. It has given the world priceless treasures from the Sumerian civilization that flourished in southern Iraq.
The Sumerians, whose ethnic and linguistic stock is still a mystery, invented writing and established a civil system of government in southern Iraq more than 5000 years ago.
Skeletal remains of at least 19 individuals, including three women, two children and an infant, were found placed on a plastered basin buried under a house floor in Southeast Anatolia in 1998.
Turkish archaeologist Omur Dilek Erdal, who examined the human remains in terms of cranial traumas (head injuries), has revealed that his study provides links to possible massacres among ancient population.
The study findings, published in the current issue of International Journal of Osteoarchaeology, suggest that about 16 of the adult skeletons showed signs of more violent cranial traumas, which were probably caused by spears or axes.
Jiri Kuchar, who wrote two books on the collection, said Friday the paintings found at the Doksany monastery 50 kilometres (30 miles) north of Prague were worth about 50 million koruna (two million euros, $2.7 million).
"They're part of Hitler's collection of about 45 paintings, about 30 statues, a writing table and some gifts, which was declared former Czechoslovakia's war booty," Kuchar told AFP.
The paintings include the 1943 Memory of Stalingrad by Franz Eichhorst, who was "Hitler's ace painter," Kuchar said.
The collection was deposited at the southern Czech monastery of Vyssi Brod during World War II, together with two larger collections formerly owned by German-born Jewish banker Fritz Mannheimer and the Rothschild family.
A rare home video that captured the explosion of the space shuttle Challenger on Jan. 28, 1986, has been found. Bob Karman and his family were on a return trip from vacation to Disney World, and filmed the launch from the Orlando airport. This is thought to be only the second amateur video taken of the launch, back when home video cameras were just becoming popular.

Thomas Hobbes was one of Europe's most famous philosophers; now a new document discovered in a collection of papers in the British Library reveals that he put together a plan to win the English Civil War for the king.
A newly discovered document, written by one of Europe's most famous philosophers, Thomas Hobbes, reveals a plan that, if successful, could have turned the tide of one of England's bloodiest wars.
In the words of Hobbes, the plan would prevent the "ruine of the English nation." The document was written during the height of the English civil war, a series of conflicts between 1642 and 1651 that saw King Charles I (and later his son Charles II), pitted against his country's parliament.
Hobbes, whose work encompassed politics, history, law, physics and mathematics, was a strong supporter of the king. And in the newfound document, discovered among papers of English writer John Evelyn in the British Library, Hobbes proposes a plan to win the war by getting the head of the parliamentary navy, Earl of Warwick Robert Rich, to defect.
Hobbes had sent his document to Evelyn's father-in-law, Richard Browne, who acted effectively as the king's ambassador to France. The handwriting is identical to Hobbes',and the document itself is marked "Proposition. E. of Warwick &ct. T. H."
"We don't have any other document of this kind from Hobbes' pen," Noel Malcolm, a senior research fellow at All Souls College, University of Oxford, told LiveScience in an interview. Malcolm explained that Hobbes' political writing tended to be fairly abstract. "Here, you see him get his fingers dirty in real-life politics."
The document, and Malcolm's analysis of it, are published in the most recent issue of The Historical Journal.

The engraving consisted of a more complex geometric pattern that looks like the letter “X” repeated in a connected series.
A colorful pebble bearing a sequence of linear incisions may be the world's oldest engraving.
The object, which will be described in the April issue of the Journal of Archaeology, dates back approximately 100,000 years ago and could also be the world's oldest known abstract art. It was recovered from Klasies River Cave in the Eastern Cape Province of South Africa.
Associated human remains indicate that the engraved piece was certainly made by Homo sapiens," co-author Riaan Rifkin of the University of Witwatersrand's Institute for Human Evolution told Discovery News.
Rifkin and colleagues Francesco d'Errico and Renata Garcia Moreno performed extensive non-invasive analyses of the object. Methods like X-ray fluorescence and microscopic analysis enabled the researchers to examine every minute detail of the ochre pebble, which appears to have split off from a once larger piece.
The scientists conclude that humans intentionally made the sub-parallel linear incisions on the Middle Stone Age pebble.
"Upon engraving the piece with a sharp lithic implement, it is likely to have produced a markedly bright and dark red-maroon powder," Rifkin said. "The design may therefore have been strikingly visible shortly after it was produced."
The "toy car" is on display alongside toy dolls and whistles - all made out of stone - at the Mardin Museum [map]. Archaeologist Mesut Alp reports that the toy car is at least 7,500 years old - dating back to the late Stone Age.
When speaking with the Cihan news agency and reporters with Todays Zaman, Alp insisted that the item is a toy car.
Culture and Tourism Director of Mardin, Davut Beliktay, confirmed that the exhibit piece as a 7,500-year-old toy car.
Beliktay said that the car is "like a copy" of cars today; adding that it also resembles a tractor. However, he didn't explain how a toy car could be 7,500 years old.