Showing posts with label News. Show all posts
Showing posts with label News. Show all posts

Thursday, June 28, 2007

'Find of century' for Egyptology

Story from BBC NEWS

Hatshepsut templeEgyptologists say they have identified the 3,000-year-old mummy of Hatshepsut, Egypt's most powerful female ruler.
Egypt's antiquities chief Zahi Hawass made the official announcement at a packed news conference in Cairo.

It is being billed as the biggest archaeological find in Egypt since the 1922 discovery of Tutankhamen's tomb.

Archaeologists hope the mummy, which has lain unrecognised for decades, will yield clues about the mystery of her death and subsequent disappearance.

Mr Hawass has set up a DNA lab near the museum with an international team of scientists to verify the identification.

The study was funded by the US television channel Discovery which is to broadcast a documentary on the subject in July.

An important piece of the evidence is said to be that the mummy has a missing tooth, and the gap matches exactly an existing relic, a preserved tooth engraved with Hatshepsut's name.

Difficult process

Some archaeologists have expressed scepticism about the possibility of using DNA technology to identify the queen.
Hatshepsut temple

Hatshepsut's temple is one of Egypt's most visited monuments

"It's a very difficult process to obtain DNA from a mummy," US molecular biologist Scott Woodward was quoted as saying by AP news agency.

"To make a claim as to a relationship, you need other individuals from which you have obtained DNA, to make a comparison between the DNA sequences."

DNA is the molecule that contains genetic information in all organisms and can be used to establish family relationships.

Obliterated

In modern times, Hatshepsut's temple was the location of the 1997 Luxor massacre when Islamic militants gunned down 58 foreign tourists, as well as three Egyptian policemen and a tour guide.

Hatshepsut was an important 18th Dynasty ruler in the 15th Century BC, having usurped her stepson, Thutmosis III.

She was known for dressing like a man and wearing a false beard, and was more powerful than either of her more famous female successors, Nefertiti and Cleopatra.

Hatshepsut's funerary temple is one of the most visited monuments around the pharaonic necropolis of the Valley of the Kings in Upper Egypt.

But after her death, her name was obliterated from the records in what is believed to have been her stepson's revenge.

The mummy was found in Tomb KV60, said to be one of the more perplexing tombs in the Valley of the Kings because it contained two unidentified mummies, both of them women.

The tomb was first discovered by Howard Carter in 1903, but it had been ransacked in antiquity and he resealed it. It was re-opened in 1906 and one mummy was removed and identified as Sit-ra, royal nurse of Hatshepsut.

The mummy now said to be of Hatshepsut herself was left behind and did not see the light again until 1990.

Speculation that it is her was fuelled by the fact the mummy's left arm was bent in a pose thought to mark royal burials and it wore a wooden face-piece (possibly to fit a false beard).

Huge Dust Storm Breaks Out on Mars

By: Dave Mosher

A major dust storm has developed on the red planet, blocking sunlight and prompting Mars mission managers to keep a close eye on it, SPACE.com has learned.

It is not known how large the storm might grow, but already it is thousands of miles across. If it balloons, as dust storms have done in the past, it could hamper operations of NASA's Mars rovers Spirit and Opportunity.

For now, officials don't think the storm will threaten rover operations, however. In fact, the windy conditions on the planet have blown off large amounts of dust from the rovers' solar arrays, giving them more power. The power boost may lend a helping hand to the Opportunity rover, should officials decide to send it into Victoria Crater.

"We've been watching this storm for about six days now," said Steven Squyres of Cornell University, who is the lead scientist of the Mars Exploration Rover Project. "It's not unheard of for Martian dust storms to cover half the planet, and this one is now a regional storm."

Squyres wasn't certain of the storm's exact size, but said it appears to be thousands of miles in diameter and "ain't no little hurricane." In fact, "it's one of the most sunlight-blocking storms we've seen on Mars," he said.

According to reports from the Mars Reconnaissance Orbiter, which Squyres deemed as Mars' weather satellite, the storm has grown in size and is lifting up dust about 560 miles (900 KM) east of Opportunity, which is presently at Meridiani Planum. "The Mars Reconnaissance Orbiter team is watching this closely, because we worry about dust in the atmosphere obscuring the sunlight," Squyres said.

Experienced amateur astronomers have spotted the storm with large telescopes. Paul Maxson of Phoenix, Arizona, was one of the first to image the storm.

Dust storms on Mars occur regularly, but seldom do they grow beyond regional proportions. A storm in 2001, however, engulfed the entire planet in red dust.

"If the storm continues to get worse, it could cut into our activities," Squyres said. One of those activities, should the team decide it's not too risky, could be the descent of Opportunity into the massive Victoria Crater. A press conference is planned for Thursday to discuss the decision.

"The upshot of all this wind is that the arrays are so clean that the dust is insignificant right now," he said. "But this is Mars, and we can't predict the weather-we can only to react to it."

Diana Blaney, the deputy project manager for the Mars exploration rovers at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, said dust levels can significantly impact the rovers' missions. "When big dust storms like this come along, they decrease the energy the rovers can work with," Blaney said.

JPL spokesperson Guy Webster said Mars mission managers will be monitoring the storm's progress and how it may affect the planned descent into the crater. "They've really been paying attention to the storm and been getting regular reports of its progress," Webster said.