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unixronin: Galen the technomage, from Babylon 5: Crusade (Default)
Unixronin

December 2012

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December 1st, 2010

unixronin: A somewhat Borg-ish high-tech avatar (Techno/geekdom)
Wednesday, December 1st, 2010 12:48 pm

As reported here, on Marketwatch, and again here, on Techland, Comcast is extorting Netflix and Level 3 Communications to allow Comcast customers access to Netflix content.

"Nice business you have here.  It'd be a shame if anything were to, you know, happen to it."

This needs to be crushed like a bug, and soon.  Level3 made a strategic error in paying the fee at all in the first place.  "Once you have paid the Danegeld, you'll never be rid of the Dane."

unixronin: Richard Feynman (Richard Feynman)
Wednesday, December 1st, 2010 03:54 pm

yesterday, NASA really stirred people up with a cryptic announcement of a press conference relating to astrobiology.  Today, this NASA blog post has quieted a little of the speculation.

The conference, it turns out,. will discuss the issues relating to "shadow biospheres" with different biochemistry.  And it's about damned time!  I've been lamenting for ... well, decades now, really, that the search for "extra-terrestrial life" was being too narrowly confined to a definition of life that really means "Earth-type life".  All the basic assumptions included the unspoken assumption that all viable biospheres must be Earthlike, and all possible biochemistries built upon the same chemical basis as our biochemistry.  Many learned scientists have declaimed at length upon the pronunciation that a CHONP-based biochemistry is the only possible one, because it's what works here, and all the alternative biochemistries people have proposed won't work here.

Except of course, that in recent years we've found different biochemistries right here on Earth.  Metabolic cycles based upon oxidizing sulfur, for example, that are viable only within deep-sea black smokers.  What happens on a planet where the predominant environment is like that of a black smoker?  And as the blog points out, this article in the International Journal of Astrobiology asks whether our planet could as easily have gone down the path of using arsenic instead of phosphorus, and points out that arsenic is toxic to us precisely because it so easily — yet not exactly — substitutes for phosphorus.

Who knows what could be a viable biochemistry in, say, a methane-hydrogen atmosphere under two hundred bar of pressure at 160K?  Or perhaps an atmosphere of sulfuric acid vapor at two bar and 900K? We for sure don't know.  We haven't even tried to find out.

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unixronin: A somewhat Borg-ish high-tech avatar (Techno/geekdom)
Wednesday, December 1st, 2010 04:20 pm

Coming soon to a fiber near you?  Interesting reading.