bmcghie
3rd February 2008 - 06:40 PM
Unfortunately paul h, I'd have to believe you on that "Life on Mars" headline.
However, it wouldn't have to be as ridiculous as it sounds. If we did find a virus, it would have required a life form to allow it to reproduce. So, at some point or another, life must have been on Mars, given the virus didn't fall off the rover.

I'm actually very unsure as to where viruses fall. Firstly, they incorporate a huge variety of the 'organic' components that we find elsewhere in life. It seems as though they are definitely 'organic' in that sense of the word. But on the other hand, they lack the ability to respond to their environment in a significant way. A bacteria is able to respond to different concentrations of compounds in it's immediate environment instantly by regulating gene transcription/translation, enzyme activity etc... but viruses are inert. If anything, I'd call them parasites, but they don't even perform metabolic functions. It's quite a tricky subject.
To further cloud the picture. Look at
this.I can't find who said this originally, but it sums up my sentiments. "A virus is a virus!" I would postulate that they are not alive in the sense that you and me are, possibly getting close to the way that bacteria are, and are certainly not inorganic/dead!