Xenobiology session with the exposure I'd like that in our universe, we were not alone. But the foregoing is no more than a session xenobiology with exposure. We hope the fans of extraterrestrial life does not lose anything, because not everyone can become pessimistic in this regard.
Shell of the diatom, presumably from Nitzschia, found at an altitude of 25 km. According to sheffildtsev, these heights it had brought a comet. (Illustration N. Chandra Wickramasinghe et al.)
You can practice as much as necessary in the wit (say, British scientists have discovered the remains of an alien in the stratosphere), but the authors of this work launched into the upper atmosphere usual stratospheric balloon (EB), which took off at 27 km and gathered together a number of particles, including a fragment of diatom shells.
Statement of extraterrestrial origin of the latter has been done by those who have already arranged such demarches. Thus, at the time the study authors found traces of similar organisms in meteorites that fell to Earth. A Nalin Chandra Wickramasinghe - one of the authors of the idea of panspermia - and did made a career out of similar reasoning, such as the theory of an extraterrestrial origin of red rain and atypical pneumonia.
The idea of it is simple: shells of diatoms are heavier than air, which means that even if some unknown mechanism of science and would put them in the heavens, they would have dropped out immediately.
It shall enter into force known binary opposition «I want to believe» - Occam's razor. On the one hand, to come up with a mechanism that would allow diatoms (or their shells) soar into the stratosphere, is not as hard as you agree with the panspermia. On the other hand, such a mechanism okkamovskogo no one has suggested that emphasize Mr.
Wickramasinghe and his colleagues.
In addition, diatoms, according to today's data, there were approximately 185 million years ago in the Cretaceous period. So, they can not be so ancient group to come from outer space as the ancestors of all life on earth. That is, they should have a relatively recent cosmic origin that causes make a number - rather long - the assumption that the DNA must be characteristic of the earth, and for extraterrestrial life.
And that somewhere near us there is a planet with water oceans, the algae that use the same chlorophyll that our plant. The latter is particularly questionable, since even in the world of plant chlorophyll does not coincide with bacterial, others of them use the energy of the sun and even without chlorophyll. But outside of our range of stars should cause other key elements of photosynthesis, with a high probability that exclude the presence of diatoms in the usual terrestrial chlorophyll.
Finally, these organisms are responsible for the existence of this breed as diatomaceous earth. According to current data, its weathering - one of the most significant sources of dust in the Earth's atmosphere. And with this dust accidentally undecomposed diatom shell is quite capable to get in the stratosphere, although it must be recognized that the shell itself is really not very common phenomenon that high. However Bodele in Chad Basin, considered, presumably, the main source of diatomaceous dust, exports, these particles even in Europe.
It may be that some of the dust of this kind is capable of rising above the troposphere?
Speculation that to us from space fall complex creatures, which in this case is ideal for life on Earth, implicitly postulate that all habitable planets similar to disgust. (Illustration Rindiny.)
So, the question is this: which is more likely - that our knowledge of the transfer of particles from the troposphere to the stratosphere are incorrect or that the comet was indeed bring us goodness knows where the shells of diatoms living in general, in surface waters, which is the Earth in our Solar is too much?
As the island observers, instead of an answer to this question is a group of Mr. Wickramasinghe pinned to the British science label of discovery of extraterrestrial life. We would add: once again.
in the wake of Journal of Cosmology, University of Sheffield, The Guardian, compulenta.computerra.ru
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