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  • 1
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2001-06-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cooper, A -- Rambaut, A -- Macaulay, V -- Willerslev, E -- Hansen, A J -- Stringer, C -- New York, N.Y. -- Science. 2001 Jun 1;292(5522):1655-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11388352" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Animals ; Australia ; Base Sequence ; Biological Evolution ; DNA Damage ; DNA, Mitochondrial/*genetics ; Hominidae/*genetics ; Humans ; *Paleontology ; *Phylogeny ; Specimen Handling
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2009-09-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rockstrom, Johan -- Steffen, Will -- Noone, Kevin -- Persson, Asa -- Chapin, F Stuart 3rd -- Lambin, Eric F -- Lenton, Timothy M -- Scheffer, Marten -- Folke, Carl -- Schellnhuber, Hans Joachim -- Nykvist, Bjorn -- de Wit, Cynthia A -- Hughes, Terry -- van der Leeuw, Sander -- Rodhe, Henning -- Sorlin, Sverker -- Snyder, Peter K -- Costanza, Robert -- Svedin, Uno -- Falkenmark, Malin -- Karlberg, Louise -- Corell, Robert W -- Fabry, Victoria J -- Hansen, James -- Walker, Brian -- Liverman, Diana -- Richardson, Katherine -- Crutzen, Paul -- Foley, Jonathan A -- England -- Nature. 2009 Sep 24;461(7263):472-5. doi: 10.1038/461472a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Stockholm Resilience Centre, Stockholm University, Kraftriket 2B, 10691 Stockholm, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19779433" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biodiversity ; Civilization ; Conservation of Natural Resources/*methods/trends ; *Earth (Planet) ; Ecology/*methods/*trends ; *Ecosystem ; Extinction, Biological ; Fossils ; Green Chemistry Technology/*methods/trends ; Greenhouse Effect ; History, 20th Century ; History, 21st Century ; History, Ancient ; *Human Activities/history ; Humans ; Nitrogen/metabolism ; Phosphorus/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2004-11-30
    Description: The widespread extinctions of large mammals at the end of the Pleistocene epoch have often been attributed to the depredations of humans; here we present genetic evidence that questions this assumption. We used ancient DNA and Bayesian techniques to reconstruct a detailed genetic history of bison throughout the late Pleistocene and Holocene epochs. Our analyses depict a large diverse population living throughout Beringia until around 37,000 years before the present, when the population's genetic diversity began to decline dramatically. The timing of this decline correlates with environmental changes associated with the onset of the last glacial cycle, whereas archaeological evidence does not support the presence of large populations of humans in Eastern Beringia until more than 15,000 years later.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shapiro, Beth -- Drummond, Alexei J -- Rambaut, Andrew -- Wilson, Michael C -- Matheus, Paul E -- Sher, Andrei V -- Pybus, Oliver G -- Gilbert, M Thomas P -- Barnes, Ian -- Binladen, Jonas -- Willerslev, Eske -- Hansen, Anders J -- Baryshnikov, Gennady F -- Burns, James A -- Davydov, Sergei -- Driver, Jonathan C -- Froese, Duane G -- Harington, C Richard -- Keddie, Grant -- Kosintsev, Pavel -- Kunz, Michael L -- Martin, Larry D -- Stephenson, Robert O -- Storer, John -- Tedford, Richard -- Zimov, Sergei -- Cooper, Alan -- New York, N.Y. -- Science. 2004 Nov 26;306(5701):1561-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Henry Wellcome Ancient Biomolecules Centre, Oxford University, South Parks Road, Oxford OX13PS, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15567864" target="_blank"〉PubMed〈/a〉
    Keywords: Alaska ; Animals ; Bayes Theorem ; *Bison/classification/genetics ; Canada ; China ; *Climate ; DNA, Mitochondrial/genetics ; Environment ; *Fossils ; Genetic Variation ; Genetics, Population ; Human Activities ; Humans ; North America ; Phylogeny ; Population Dynamics ; Sequence Analysis, DNA ; Time
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 2007-09-22
    Description: Water has supposedly marked the surface of Mars and produced characteristic landforms. To understand the history of water on Mars, we take a close look at key locations with the High-Resolution Imaging Science Experiment on board the Mars Reconnaissance Orbiter, reaching fine spatial scales of 25 to 32 centimeters per pixel. Boulders ranging up to approximately 2 meters in diameter are ubiquitous in the middle to high latitudes, which include deposits previously interpreted as finegrained ocean sediments or dusty snow. Bright gully deposits identify six locations with very recent activity, but these lie on steep (20 degrees to 35 degrees) slopes where dry mass wasting could occur. Thus, we cannot confirm the reality of ancient oceans or water in active gullies but do see evidence of fluvial modification of geologically recent mid-latitude gullies and equatorial impact craters.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McEwen, A S -- Hansen, C J -- Delamere, W A -- Eliason, E M -- Herkenhoff, K E -- Keszthelyi, L -- Gulick, V C -- Kirk, R L -- Mellon, M T -- Grant, J A -- Thomas, N -- Weitz, C M -- Squyres, S W -- Bridges, N T -- Murchie, S L -- Seelos, F -- Seelos, K -- Okubo, C H -- Milazzo, M P -- Tornabene, L L -- Jaeger, W L -- Byrne, S -- Russell, P S -- Griffes, J L -- Martinez-Alonso, S -- Davatzes, A -- Chuang, F C -- Thomson, B J -- Fishbaugh, K E -- Dundas, C M -- Kolb, K J -- Banks, M E -- Wray, J J -- New York, N.Y. -- Science. 2007 Sep 21;317(5845):1706-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA. mcewen@lpl.arizona.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17885125" target="_blank"〉PubMed〈/a〉
    Keywords: Extraterrestrial Environment ; Geological Phenomena ; Geology ; *Mars ; *Water
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 2011-02-05
    Description: Despite radically different environmental conditions, terrestrial and martian dunes bear a strong resemblance, indicating that the basic processes of saltation and grainfall (sand avalanching down the dune slipface) operate on both worlds. Here, we show that martian dunes are subject to an additional modification process not found on Earth: springtime sublimation of Mars' CO(2) seasonal polar caps. Numerous dunes in Mars' north polar region have experienced morphological changes within a Mars year, detected in images acquired by the High-Resolution Imaging Science Experiment on the Mars Reconnaissance Orbiter. Dunes show new alcoves, gullies, and dune apron extension. This is followed by remobilization of the fresh deposits by the wind, forming ripples and erasing gullies. The widespread nature of these rapid changes, and the pristine appearance of most dunes in the area, implicates active sand transport in the vast polar erg in Mars' current climate.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hansen, C J -- Bourke, M -- Bridges, N T -- Byrne, S -- Colon, C -- Diniega, S -- Dundas, C -- Herkenhoff, K -- McEwen, A -- Mellon, M -- Portyankina, G -- Thomas, N -- New York, N.Y. -- Science. 2011 Feb 4;331(6017):575-8. doi: 10.1126/science.1197636.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Planetary Science Institute, Tucson, AZ 85719, USA. cjhansen@psi.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21292976" target="_blank"〉PubMed〈/a〉
    Keywords: *Carbon Dioxide ; Dry Ice ; Extraterrestrial Environment ; *Mars
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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