quarta-feira, 30 de maio de 2007

War of the pyramid theorists


Every significant historical site goes through periods of the day when the surrounding environment make a visit truly worthwhile. At the pyramids of Giza, the view at sunset can push away the claustrophobic memory of the flocks of tourists and local souvenir-sellers who dominate the site earlier in the day. In the hush of sunset, visitors can appreciate the beautiful symmetry of these ancient tombs as the half-light of dusk eradicates the imperfections of age that are evident during the day. The mathematical perfection of these monuments has puzzled archeologists for centuries. How could the civilization that existed when the pyramids were built 4,700 years ago have created this colossal necropolis?The answer has long been mired in confusion. So much mystery surrounds the pyramids that some have suggested that supernatural, divine or even extraterrestrial forces must have been responsible for their construction. The Bible, of course, asserts that ancient Israelite slaves performed much of the backbreaking labor in ancient Egypt, but in the modern Arab republic, this claim is widely disputed. In the year 2007, many prominent Egyptologists in Cairo refute the idea that the pyramids were built by slaves at all.

The list of scholars who align themselves with this train of thought is headed by Egypt's Chairman of the Supreme Council of Antiquities, Dr. Zahi Hawass. In 2002, a team led by Hawass explored unopened chambers inside the pyramids using new technology, and at the end of the process a triumphant Hawass told the world press that his findings, particularly the skeleton of a fourth-century Egyptian, showed that the pyramids were "not built by slaves," but rather by the "great Egyptians."
http://www.jpost.com/servlet/Satellite?cid=1173879224279&pagename=JPost%2FJPArticle%2FShowFull

Scientists in the US say that initial data from a new way of scanning Mars has shown up to half of the Red Planet's surface may contain ice.

The new method of scanning for water offers vastly more accurate readings than before, they say.

The data could prove vital for the Phoenix Mars Mission which launches this August and which will put a lander on the surface to dig for ice.

The new data shows wide variation as to how deep below the surface ice exists.
http://news.bbc.co.uk/1/hi/sci/tech/6617851.stm

segunda-feira, 28 de maio de 2007

Vast Regions of Antarctica Melted Recently


A team of NASA and university scientists has found clear evidence that extensive areas of snow melted in west Antarctica in January 2005 in response to warm temperatures.

This was the first widespread Antarctic melting ever detected with NASA's QuikScat satellite and the most significant melt observed using satellites during the past three decades. Combined, the affected regions encompassed an area as big as California.

Son Nghiem of NASA's Jet Propulsion Laboratory, Pasadena, Calif., and Konrad Steffen, director of the Cooperative Institute for Research in Environmental Sciences at the University of Colorado, Boulder, led the team. Using data from QuikScat, they measured snowfall accumulation and melt in Antarctica and Greenland from July 1999 through July 2005.
http://www.redorbit.com/news/science/936648/vast_regions_of_antarctica_melted_recently/index.html

Medieval Buddhist Paintings Found in Snowbound Nepalese Cave


KATMANDU, Nepal — Paintings of Buddha dating back at least to the 12th century have been discovered in a cave in Nepal's remote north-central region by a team of international researchers who were tipped by a local sheep herder.

A mural with 55 panels depicting the story of Buddha's life was uncovered in March, with the team using ice axes to break through a snow path to reach the cave in Nepal's Mustang area, about 160 miles northwest of the capital, Katmandu.

"What we found is fantastically rich in culture and heritage and goes to the 12th century or earlier," Broughton Coburn, a writer and conservationist from Jackson Hole,
http://www.foxnews.com/story/0,2933,270787,00.html?sPage=fnc.science/archaeology

Windows onto the abyss: cave skylights on Mars


Today's set of image releases from the Mars Reconnaissance Orbiter HiRISE team included this one, of a fairly bland-looking lava plain to the northeast of Arsia Mons. Bland, that is, except for a black spot in the center. What's that black spot? It's a window onto an underground world.

This black spot is one of seven possible entrances to subterranean caves identified on Mars by Glen Cushing, Tim Titus, J. Judson Wynne and Phil Christensen in a paper they presented at the Lunar and Planetary Science Conference in March (PDF format, 322k). Here's the figure from their paper that shows the seven caves, which they refer to by the names Dena, Chloe, Wendy, Annie, Abbey, Nikki, and Jeanne
http://www.planetary.org/blog/article/00000984/