Science & Technology
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| ©UNESCO/Alida Boye |
| A manuscript from Timbuktu (Mali) |
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| ©S. Mashtotz Institute of Ancient Manuscripts, Matenadaran |
The excavated tomb, which dates to before the Qin dynasty (221 to 206 B.C.), contained nine people believed to have been buried alive in a tomb that had already been filled with corpses, the state-run China Daily news service reported. The tomb also contained bronze cooking vessels and chimes.
The find reveals new details about the ancient Toltec civilization and adds to an ongoing debate over ritualistic killing in historic Mesoamerica.
Construction crews unearthed the burial chamber this spring near the town of Tula, the ancient Toltec capital, 50 miles (80 kilometers) north of Mexico City.
The chamber contained 24 skeletons of children believed to have been sacrificed between A.D. 950 and 1150, according to Luis Gamboa, an archaeologist at Mexico's National Institute of Anthropology and History.
All but one of the children were between 5 to 15 years of age, and they were likely killed as an offering to the Toltec rain god Tlaloc, Gamboa said.
Etruscan culture was very advanced and quite different from other known Italian cultures that flourished at the same time, and highly influential in the development of Roman civilisation. Its origins have been debated by archaeologists, historians and linguists since time immemorial. Three main theories have emerged: that the Etruscans came from Anatolia, Southern Turkey, as propounded by the Greek historian Herotodus; that they were indigenous to the region and developed from the Iron Age Villanovan society, as suggested by another Greek historian, Dionysius of Halicarnassus; or that they originated from Northern Europe.
Now modern genetic techniques have given scientists the tools to answer this puzzle. Professor Piazza and his colleagues set out to study genetic samples from three present-day Italian populations living in Murlo, Volterra, and Casentino in Tuscany, central Italy. "We already knew that people living in this area were genetically different from those in the surrounding regions", he says. "Murlo and Volterra are among the most archaeologically important Etruscan sites in a region of Tuscany also known for having Etruscan-derived place names and local dialects. The Casentino valley sample was taken from an area bordering the area where Etruscan influence has been preserved."
The finding, detailed in the June 14 issue of the journal Nature, suggests Saturn's satellites Tethys and Dione might be volcanically active after all.
Known as plasma, the gas is composed of negatively charged electrons and positively charged ions, which are atoms with one or more electrons missing. After being ejected from the moons, the charged particles become trapped inside the magnetic field surrounding Saturn, called the magnetosphere.
A great escape
The particles remain trapped only temporarily, however, because Saturn spins so fast about its axis-a day there is only 10 hours and 46 minutes long-that it drags its magnetosphere and the trapped plasma inside it rapidly through space.
After three years of research, Australian scientists have come up with a solution to keeping the animals in - the virtual fence.
"It's like an electric fence, except it's invisible," Andrew Fisher, leader of a research team at the CSIRO's Livestock Industries division in Armidale, said yesterday.
A farmer would create the virtual fence by mapping out the proposed boundary using a computer linked to a satellite global positioning system.
The livestock to be fenced in would wear battery-powered collars around their necks. If a cow, for example, wandered within a metre or two of the virtual fence the collar, fitted with a GPS chip, would emit a warning hum. If the cow ignored the sound and crossed the line it would receive a mild electric shock, less powerful than those used by electric fences.
The Atlas V rocket launched Friday morning, hauling a payload from the National Reconnaissance Office, a division of the Department of Defense that builds and operates spy satellites.
The researchers said a rocket carrying the scramjet reached speeds of mach 10 -- ten times the speed of sound -- after blasting off at the Woomera range in South Australia Friday.






