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I have created novel species by inserting a gene into bacteria. The bacteria still functions in a recognisable 'Earthly' manner. That does not mean that there has been no intelligent intervention in the development of its germ line. We can grow ears on the back of a mouse but it only happens if there is intervention from an 'alien' intelligence.
Do you see how it is possible that a species other that Homo sapiens might do the same?
Originally posted by Astyanax
reply to posts by Pimander and Uncle Gravity
Originally posted by Pimander
With respect, I don't call myself a scientist - I am one.
And – by my own account – I’m the murdered son of the Trojan hero Hector.
But never mind. At least one person here takes you at your word, and is delighted to do so:
No. Panspermia is an unfalsifiable hypothesis that multiplies entities unncessarily. It therefore fails the test of Occam’s Razor.
The principle of simplicity works as a heuristic rule-of-thumb but some people quote it as if it is an axiom of physics. It is not. It can work well in philosophy or particle physics, but less often so in cosmology or psychology, where things usually turn out to be more complicated than you ever expected. Perhaps a quote from Shakespeare would be more appropriate than Occam's razor: "There are more things in heaven and earth, Horatio, Than are dreamt of in your philosophy."
Simplicity is subjective and the universe does not always have the same ideas about simplicity as we do....
...The law of parsimony is no substitute for insight, logic and the scientific method. It should never be relied upon to make or defend a conclusion. As arbiters of correctness only logical consistency and empirical evidence are absolute.
Relativity FAQ: What is Occams Razor?
Originally posted by Astyanax
Panspermia is a stupid hypothesis....
Originally posted by Astyanax
As for panspermia, it is stupid not because it is implausible (it is not) but because it is trivial. It matters not a whit whether the planet was ‘seeded’ with life from outer space or developed it indigenously.
A team of researchers at MIT is proposing to apply forensic science testing on the Martian surface. Specifically, the task would be to do DNA and RNA sequencing on Martian microbes (if they exist) to seen if they share a common genetic origin with us.
This addresses the novel question of panspermia -- that we are descended from Mars life that migrated to Earth. Such testing could also offer key insights into how serious a risk Martian microbes would present to human colonists.
The MIT team led by Christopher Carr and Maria Zuber (head of MIT's Department of Earth, Atmospheric and Planetary Sciences) and Gary Ruvkun, a molecular biologist at the Massachusetts General Hospital and Harvard University, are proposing to build an instrument to send to Mars and test for extraterrestrial genomes.
news.discovery.com...
Surely you know that was poor form?
You the readers of this will have to judge me by the content of my posts.
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We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances.
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Panspermia is NOT stupid. I could easily be a lot ruder here but I prefer not to stoop to your level.