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NASA May Have Killed The Martians
Sneakernets writes "CNN reports that NASA may have found life on Mars via the Viking space probes in 1976-77, but failed to recognize it and killed it by accident. Dirk Schulze-Makuch, a geology professor at Washington State University, says that Mars microbes that the space probes had found were possibly drowned and baked by accident. Other experts said the new concept is plausible, but more work is needed before they are convinced. From the article: 'A new NASA Mars mission called Phoenix is set for launch this summer, and one of the scientists involved said he is eager to test the new theory about life on Mars. However, scientists must come up with a way to do that using the mission's existing scientific instruments, said NASA astrobiologist and Phoenix co-investigator Chris McKay.'"
This same article was on digg a while back, so I've read it already.
The title implies that NASA killed off all of the martians, while the article says that if Viking had found a few martian microbes in its sample, it would have killed those.
There's no need for the sensationalism.
... of old objections with a slight new twist about peroxides.
Back in the 70's the results of the "chicken soup" (gas exchange) experiment on board the Vikings were frustratingly inconclusive - the resulting single release of gas when combining martian soil with a mixture of likely nutrients could have been produced by several mechanisms: (1) a simple chemical reaction between the soil sample and the "soup", or (2) the death rattles of an organism poisoned by the "soup" or (3) the initial metabolic release of (an) organism(s) that ate itself to death like a goldfish on the nutrient "soup".
"Win treats sysadmins better than users. Mac treats users better than sysadmins. Linux treats everyone like sysadmins."
We have found many new and oddball extremophiles over the last few decades living right here on Earth in places that were once considered impossibly "hostile to life". This has resulted in a tree of life with many more branches than the animal, plant and fungi ones I was taught at high school.
The three "essential ingredients" for life now seem to be carbon, water and energy but we haven't finished searching the planet yet, let alone our solar system and beyond.
To summerize: "It's life Jim, but not as we know it".
And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
Debate over the validity of the biological experiments on the Viking probes has been going on since the probes landed.
You see.... several of the biological experiments on Viking turned up positive. However, this result contradicted other components of the same experiment, which indicated that there were no organic molecules in the soil, among other factors, making the possibility of life existing in those soil samples remotely minute.
It was largely agreed upon that the experiments were inconclusive and poorly designed all the way back in the 80s. The fact that this guy is making this argument about an experiment that yielded a false-positive is somewhat absurd. The bits of the experiment that turned up negative would have hypothetically yielded the same result on a living organism as a dead one.
The ill-fated Beagle 2 probe was supposed to repeat/confirm several of the Viking experiments.
Of course, that's not to say that we shouldn't be reproducing these experiments to figure out what went wrong, and what produced the false positive, as I'm sure there's plenty of interesting science to be explored there as well. I wouldn't completely rule out the possibility of life on mars either -- as mentioned earlier, the experiments were inconclusive.
-- If you try to fail and succeed, which have you done? - Uli's moose