منابع مشابه
Very Recent Hydroclimatic Change on Mars?
Introduction: The geomorphology and geology of Mars, for at least the last 20 years [1], has presented a consistent, coherent picture of that planet as water-rich, such that aqueous activity has occurred, sporadically at least, on its surface throughout its history. The robustness of this conclusion is evidenced in its persistence , despite difficulties of reconciliation with geo-physical and g...
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Detailed studies exist that explore the global, seasonal, and interannual variations of the Martian lower atmosphere (below 90 km) [e.g. Liu et al., 2003]. Key findings indicate that observed temperatures are quite repeatable from one Mars aphelion season to the next. Conversely, perihelion temperatures can change radically on an interannual basis, depending on the timing and intensity of dust ...
متن کاملCryovolcanism and the Recent Flow of Liquid Water on Mars
The surface of Mars is too cold and dry to permit stable liquid water, yet fresh, apparently water-carved gullies and seepage features have been identified in high-resolution imaging of canyon and crater walls by the Mars Global Surveyor spacecraft. Here, a model of nonequilibrium hydrological activity and liquid water cryovolcanism explains the paradoxical appearance and observed properties of...
متن کاملPodium for the opposition?
This is quite a paradoxical era. Scientific research is in its most productive phase and it continues to produce many beneficial technologies for mankind. For example, we rapidly progress towards a better understanding of many diseases and come up with multiple new approaches to cure them. At the same time, however, the voices against science and technology have never been more shrill. But unsu...
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in the present study, the effect of e-64 at different concentrations (0.5, 1, 5 and 10 µm) added to (1) the ivm medium on oocyte nuclear maturation and developmental competence of ovine oocytes, and (2) to the ivc medium on embryonic development of ovine embryos were investigated.
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ژورنال
عنوان ژورنال: Nature
سال: 1910
ISSN: 0028-0836,1476-4687
DOI: 10.1038/083440a0