This occurrence lends support to the hypothesis of an abrupt increase in crustal thickness between West and East Antarctica. In 1969, deep seismic soundings were carried out by the 14th Soviet Antarctic Expedition near the coast of Queen Maud Land. The crustal thickness was found to be about 40...
In sessile marine organisms, gene flow between populations depends mainly on free-living reproductive stages (such as larvae and gametes), and usually the strength of genetic structure is related to the time spent in the plankton and physical factors as oceanographic conditions. In Antarctica, ...
In October, I flew to Antarctica from Punta Arenas. I'd allowed 70 days, which would make it the longest 3 one-way expedition across Antarctica I only took 4 . I didn't even take a hairbrush. The first few days were 5 . The winds were about 60 mph, and my sled weighed 120 kg...
An oval-shaped( 椭圆形)structure,which is believed to be 121 meters across,is shown in a picture of AntarcticaSome say the structure is evidence that human civilization once lived in the South Pole,while others say it may be a natural phenomenon."What if,in the distant past,an ancient civ...
Deserts– Quite the opposite oftundrain many ways, but still harsh, more animals live in the extreme heat than in the extreme cold of Antarctica, for instance. Savannas– These differ from deserts because of the rain they get each year. Whereas deserts get only a tiny amount of precipitation...
RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook age structure Medical [′āj ‚strək·chər] (anthropology) Categorization of the population of communities or countries by age groups, allowing demographers to make projections of the growth or decline of th...
In the Vestfold Hills and Rauer Islands, three different genera have been found to dominate the haloarchaea population of hypersaline lakes, making photoheterotrophy the main microbial process occuring in these lakes [38, 40, 41, 106]. The species appear to be endemic to Antarctica, with one ...
An oval-shaped(椭圆形) structure, which is believedto be 121 metres across, is shown in a picture ofAntarctica.Some say the structure is evidence that humancivilization once lived in the South Pole, while others say itmay be a natural phenomenon.What if, in the distant past, an ancient ...
Beyond that point, in a region analogous to the solar system's Kuiper Belt, the scientists found a narrow band with significantly less dust, which they said may be evidence of a planet in the process of forming. Emerging from the outer edge of this band are two spiral arms that extend ...
Above 1500 m the surface temperature lapse rate becomes significantly superadiabatic and the coldest surface temperatures are found a few 10s of kilometres inland of the highest topography. The technique may prove useful for studying boundary layer structure in other regions of Antarctica where suitable...