منابع مشابه
Microbial Analyses of Ancient Ice Core Sections from Greenland and Antarctica
Ice deposited in Greenland and Antarctica entraps viable and nonviable microbes, as well as biomolecules, that become temporal atmospheric records. Five sections (estimated to be 500, 10,500, 57,000, 105,000 and 157,000 years before present, ybp) from the GISP2D (Greenland) ice core, three sections (500, 30,000 and 70,000 ybp) from the Byrd ice core, and four sections from the Vostok 5G (Antarc...
متن کاملPreservation of Ancient Glacial Ice Below Sublimation Till in the Dry Valleys of Antarctica: Implications for Mars
Introduction: Pascal is a Mars Climate Network Mission that is being developed for NASA's Mars Scout Program. The mission would establish a network of 18 science weather stations distributed across the entire surface of Mars that operates for 3-10 Mars years (5.6-18.8 Earth years). Pascal's instrument suite combines entry data from accelerometers and descent cameras, with landed data from press...
متن کاملAncient DNA enables timing of the pleistocene origin and holocene expansion of two adélie penguin lineages in antarctica.
The timing of divergent events in history is one of the central goals of contemporary evolutionary biology. Such studies are however dependent on accurate evolutionary rates. Recent developments in ancient DNA analysis enable the estimation of more accurate evolutionary rates and therefore more accurate timing of divergence events. Consequently, this leads to a better understanding of changes i...
متن کاملA Novel Adenovirus in Chinstrap Penguins (Pygoscelis antarctica) in Antarctica
Adenoviruses (family Adenoviridae) infect various organ systems and cause diseases in a wide range of host species. In this study, we examined multiple tissues from Chinstrap penguins (Pygoscelis antarctica), collected in Antarctica during 2009 and 2010, for the presence of novel adenoviruses by PCR. Analysis of a 855-bp region of the hexon gene of a newly identified adenovirus, designated Chin...
متن کاملEndometriosis: ancient disease, ancient treatments.
E ver since Vincent Knapp published his 1999 article ‘‘How old is Endometriosis?’’ (1), there seems to have been renewed interest in identifying just when endometriosis was discovered as a distinct disease entity. While the history of endometriosis subsequent to its 1860 microscopic unveiling by Karl von Rokitansky has been well-studied, its story leading up to that moment has remained largely ...
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ژورنال
عنوان ژورنال: Nature
سال: 1905
ISSN: 0028-0836,1476-4687
DOI: 10.1038/072244d0