|
| ©P. Schenk/NASA/LPI |
| Arc-shaped troughs (black and white arrows) extend 100s of kilometers on the surface of Jupiter's moon Europa. These enigmatic features are likely fractures resulting from a shift in Europa's spin axis. Vertical scale bar (right) is 100 km. |
Science & Technology
Washington, D.C.--Curved features on Jupiter's moon Europa may indicate that its poles have wandered by almost 90°, report scientists from the Carnegie Institution, Lunar and Planetary Institute, and University of California, Santa Cruz in the 15 May issue of Nature. Such an extreme shift suggests the existence of an internal liquid ocean beneath the icy crust, which could help build the case for Europa as possible habitat for extraterrestrial life.
In the book '1421', I contended that the Emperor Zhu Di had sent fleets to the Southern Ocean to determine the precise position of the star Canopus. The Chinese needed this information to establish accurate latitudes and longitudes in the southern hemisphere. (United Kingdom paperback edition, pages 161-3, and diagram 1).
Since the book was published we have received more than 100,000 e-mails and letters and millions of people have visited our website 'www.1421.tv'. These visitors from over 130 countries around the world have brought new evidence. To date the most important has been my underestimation of the scale of the undertaking. Instead of 100 ships, over 1000 set sail (800 arrived at Calicut alone). There were many great voyages - Fleets were continuously at sea from 1403 to 1432 and the scale of the losses was even more horrific - more than 900 ships never returned. This is exemplified in the Southern Oceans. The discovery of Zheng He's records shows that four separate fleets charted the Antarctic not the two I have claimed. Some got further south - deep into the Weddell Sea.
This memo describes a catastrophe which overtook the fleets which had sailed south of New Zealand down to Campbell Island and Auckland Island (pp.206-209 of United Kingdom Paperback edition). A huge comet struck the ocean less than a hundred miles from the fleets, incinerating many ships and hurling the blazing wrecks onto New Zealand South Island and the East coasts of Australia, and across the Pacific and Indian Oceans.
Since the book was published we have received more than 100,000 e-mails and letters and millions of people have visited our website 'www.1421.tv'. These visitors from over 130 countries around the world have brought new evidence. To date the most important has been my underestimation of the scale of the undertaking. Instead of 100 ships, over 1000 set sail (800 arrived at Calicut alone). There were many great voyages - Fleets were continuously at sea from 1403 to 1432 and the scale of the losses was even more horrific - more than 900 ships never returned. This is exemplified in the Southern Oceans. The discovery of Zheng He's records shows that four separate fleets charted the Antarctic not the two I have claimed. Some got further south - deep into the Weddell Sea.
This memo describes a catastrophe which overtook the fleets which had sailed south of New Zealand down to Campbell Island and Auckland Island (pp.206-209 of United Kingdom Paperback edition). A huge comet struck the ocean less than a hundred miles from the fleets, incinerating many ships and hurling the blazing wrecks onto New Zealand South Island and the East coasts of Australia, and across the Pacific and Indian Oceans.
"When we carefully examine ....... the Great Revolt and Masada, a portrait of heroism ...... is simply not provided. On the contrary. The narrative conveys the story of a doomed (and questionable) revolt, of a majestic failure and destruction of the Second Temple and of Jerusalem, of large-scale massacres of the Jews, of different factions of Jews fighting and killing each other, of collective suicide (an act not viewed favourably by the Jewish faith) by a group of terrorists and assassins whose "fighting spirit" may have been questionable."
An Israeli anthropologist is using modern forensics and an obscure biblical passage to challenge accepted wisdom about mysterious human remains found at Masada, the desert fortress famous as the scene of a mass suicide nearly 2,000 years ago.
A new research paper published Friday takes another look at the remains of three people found at the site and given a state burial by Israel as Jewish heroes. The remains, the study says, could actually be those of the Jews' Roman enemies.
The remains of two male skeletons and a full head of woman's hair, including two braids, were found in a bathhouse by archaeologists in the 1960s. They were long thought to belong to a family of Zealots, the fanatic Jewish rebels said to have killed themselves rather than fall into Roman slavery in A.D. 73, a story that plays an important role in Israel's national mythology.
The bathhouse remains became a key part of the site's story. Yigael Yadin, the renowned Israeli archaeologist in charge of the first dig, thought they illustrated the historical account of Zealot men killing their wives and children and then themselves before Roman legionnaires breached Masada's defenses.
A new research paper published Friday takes another look at the remains of three people found at the site and given a state burial by Israel as Jewish heroes. The remains, the study says, could actually be those of the Jews' Roman enemies.
The remains of two male skeletons and a full head of woman's hair, including two braids, were found in a bathhouse by archaeologists in the 1960s. They were long thought to belong to a family of Zealots, the fanatic Jewish rebels said to have killed themselves rather than fall into Roman slavery in A.D. 73, a story that plays an important role in Israel's national mythology.
The bathhouse remains became a key part of the site's story. Yigael Yadin, the renowned Israeli archaeologist in charge of the first dig, thought they illustrated the historical account of Zealot men killing their wives and children and then themselves before Roman legionnaires breached Masada's defenses.
A study investigating aging in mice has found that hormonal changes that occur when mice eat significantly less may help explain an already established phenomenon: a low calorie diet can extend the lifespan of rodents, a benefit that even regular exercise does not achieve.
"We know that being lean rather than obese is protective from many diseases, but key rodent studies tell us that being lean from eating less, as opposed to exercising more, has greater benefit for living longer. This study was designed to understand better why that is," said Derek M. Huffman, the study's lead author.
The study applies only to rodents, which are different in some key ways from humans, cautions Huffman. However, at least two studies which examined people who engage in high-volume exercise versus people who restricted their calorie intake, had a similar outcome: caloric restriction has physiological benefits that exercise alone does not. Researchers expect that clues to the physiology of longevity in mice will eventually be applied to people, Huffman said.
"We know that being lean rather than obese is protective from many diseases, but key rodent studies tell us that being lean from eating less, as opposed to exercising more, has greater benefit for living longer. This study was designed to understand better why that is," said Derek M. Huffman, the study's lead author.
The study applies only to rodents, which are different in some key ways from humans, cautions Huffman. However, at least two studies which examined people who engage in high-volume exercise versus people who restricted their calorie intake, had a similar outcome: caloric restriction has physiological benefits that exercise alone does not. Researchers expect that clues to the physiology of longevity in mice will eventually be applied to people, Huffman said.
Paris - Divers trained in archaeology discovered a marble bust of an aging Caesar in the Rhone River that France's Culture Ministry said Tuesday could be the oldest known.
The life-sized bust showing the Roman ruler with wrinkles and hollows in his face is tentatively dated to 46 B.C. Divers uncovered the Caesar bust and a collection of other finds in the Rhone near the town of Arles - founded by Caesar.
|
| ©AP photo/Culture Ministry, C. Chary/HO |
| A life size marble bust of Julius Cesar is seen. The bust, probably dated 46 BC, was discovered last year after underwater searches in the Rhone River near Arles, southern France. |
The life-sized bust showing the Roman ruler with wrinkles and hollows in his face is tentatively dated to 46 B.C. Divers uncovered the Caesar bust and a collection of other finds in the Rhone near the town of Arles - founded by Caesar.
Yesterday's solar "fire fountain" has subsided and the source has revealed itself. "It's a crackling, energetic region on the sun's surface," reports Pete Lawrence, who sends this picture from Selsey, UK:
|
| ©Pete Lawrence |
About every third night Trevor Barry, a retired Broken Hill mine worker, turns his attention to the sky. What he has been seeing has delighted scientists around the world.
Satellite imagery obtained from NASA will help archeologist Bill Middleton peer into the ancient Mexican past. In a novel archeological application, multi- and hyperspectral data will help build the most accurate and most detailed landscape map that exists of the southern state of Oaxaca, where the Zapotec people formed the first state-level and urban society in Mexico.
"If you ask someone off the street about Mexican archeology, they'll say Aztec, Maya. Sometimes they'll also say Inca, which is the wrong continent, but you'll almost never hear anyone talk about the Zapotecs," says Middleton, acting chair of the Department of Material Culture Sciences and professor in the Department of Sociology and Anthropology at Rochester Institute of Technology. "They had the first writing system, the first state society, the first cities. And they controlled a fairly large territory at their Zenith - 250 B.C. to 750 A.D."
|
| ©Rochester Institute of Technology |
| In a novel archeological application, multi- and hyperspectral data will help build the most accurate and most detailed landscape map that exists of the southern state of Oaxaca, where the Zapotec people formed the first state-level and urban society in Mexico. |
"If you ask someone off the street about Mexican archeology, they'll say Aztec, Maya. Sometimes they'll also say Inca, which is the wrong continent, but you'll almost never hear anyone talk about the Zapotecs," says Middleton, acting chair of the Department of Material Culture Sciences and professor in the Department of Sociology and Anthropology at Rochester Institute of Technology. "They had the first writing system, the first state society, the first cities. And they controlled a fairly large territory at their Zenith - 250 B.C. to 750 A.D."
For animals that live in social groups, and that includes humans, blindly following a leader could place them in danger. To avoid this, animals have developed simple but effective behaviour to follow where at least a few of them dare to tread -- rather than follow a single group member.
This pattern of behaviour reduces the risk of imitating maverick behaviour of an individual as the group recognise that consensus is better than following someone that goes it alone.
This pattern of behaviour reduces the risk of imitating maverick behaviour of an individual as the group recognise that consensus is better than following someone that goes it alone.
