The Skeptical Teacher

Musings of a science teacher & skeptic in an age of woo.

Posts Tagged ‘cold fusion’

The Self-Correcting Nature of Science

Posted by mattusmaximus on May 29, 2013

Often I get asked what I think is so special about science. Many times people criticize my science-oriented worldview by saying that “science is just one view” or that “science is only ‘one way’ of knowing” and so on; it goes without saying that most often I hear this criticism of science and its methodology from those who are running counter to that methodology, usually in an effort to promote some brand of pseudoscience or similar nonsense.

Well, the purpose of this post is to point out one of the most valuable aspects of science: that particular aspect of its methodology which displays the self-correcting nature of science.

First, allow me to admit, right up front, that science isn’t necessarily about finding “Truth” with a capital “T”; as much as I and my fellow scientists support science, we must acknowledge that it, at best, offers us a kind of provisional truth. That is, the “truth” (note the lower-case “t”) that science offers us is always open to revision based upon new information, and this is – contrary to what some might think – one of its greatest strengths. And, as such, what science can do is approach, however slowly and asymptotically, a more and more accurate view of the world around us as a result.

This ability of science to be open to new information, to be capable of being revised, to be self-correcting, is precisely in opposition to the kind of dogmatism which is offered by so many other modes of thought. Too often, other modes of thought, whether they be grounded in religion or some kind of rigid ideology, start with the “Truth” (capital “T”) and work from there; I like to reference the following cartoon in order to illustrate the difference…

creationism vs science

Of course, the example of creationist pseudoscience is but one example, but I think my point is made.

Something which should be added to this discussion is the fact that, just as in any human endeavor, science is prone to making mistakes. In fact, the history of science is full of errors, failed experiments, and even outright fraud; but the self-correcting nature of modern science once again comes to bear as a great strength in these cases.

For example, it was scientists who discovered the fraud behind the cold fusion fiasco in the late 1980s, wherein a pair of researchers publicly claimed (fraudulently) that they had produced fusion in a chemical reaction on a lab bench; it was careful and persistent application of scientific methodology which pointed out the errors in the claims that “faster-than-light” neutrinos had indeed gone superluminal (it ended up, at least in part, being a mistake in the experimental design); and this process continues to this day with doubts raised (yes, by scientists) about recent claims of stem-cell cloning.

This self-correcting, self-policing nature of science to peer into its own processes, methodology, and motivation is more than admirable, in my opinion; it is vitally necessary to have a mode of thought that incorporates this kind of inquiry in our world. That is because all too often when we convince ourselves of some kind of “Truth” (note that capital “T” again), it leads to the shutting down of inquiry, doubt, and analysis so necessary to see whether or not the “Truth” is just a lie.

Give me that kind of humility over the smug, self-assuring claim to “Truth” any day.

Posted in scientific method | Tagged: , , , , , , , , , , , , , , , , , , , , | 1 Comment »

The Blurring of Science With Media Spin: NASA’s Announcement About “Arsenic-Based Life”

Posted by mattusmaximus on December 11, 2010

I have to say that last week I was pretty upset with NASA, because – if you recall – there was a lot of hay being made by NASA about a big scientific discovery they were going to announce.  In the process, there was a great deal of media spin & speculation on whether or not it was going to be an announcement of the discovery of “alien life” or something similar.

But when it came time for the announcement, it ended up being something quite less spectacular: it was about how a group of NASA scientists had uncovered a form of bacterial life which seems to have adapted itself to living in the harsh conditions of a lake laced with heavy concentrations of arsenic – the original NASA press release can be accessed here.

NASA has made a pretty big deal out of this discovery, but there are some problems with how they’ve rolled it out, in my opinion.  I am of the view that they’ve oversold this thing, with overly dramatic phrases (from the above press release) such as…

NASA-funded astrobiology research has changed the fundamental knowledge about what comprises all known life on Earth.

and…

This finding of an alternative biochemistry makeup will alter biology textbooks and expand the scope of the search for life beyond Earth.

Upon hearing about this discovery, and not being a biochemist or evolutionary biologist myself, I decided to look past the spin being put on this by both NASA and the news media in general and go to people who know the field far better than me.  In a short amount of time, I found a great post by PZ Myers over at Pharyngula on the matter, wherein he states, among other things…

It’s not an arsenic-based life form

… I finally got the paper from Science, and I’m sorry to let you all down, but it’s none of the above. It’s an extremophile bacterium that can be coaxed into substiting arsenic for phosphorus in some of its basic biochemistry. It’s perfectly reasonable and interesting work in its own right, but it’s not radical, it’s not particularly surprising, and it’s especially not extraterrestrial. It’s the kind of thing that will get a sentence or three in biochemistry textbooks in the future. …

… So what does it all mean? It means that researchers have found that some earthly bacteria that live in literally poisonous environments are adapted to find the presence of arsenic dramatically less lethal, and that they can even incorporate arsenic into their routine, familiar chemistry. …

… This lake also happens to be on Earth, not Saturn, although maybe being in California gives them extra weirdness points, so I don’t know that it can even say much about extraterrestrial life. It does say that life can survive in a surprisingly broad range of conditions, but we already knew that. [emphasis added]

And, unfortunately, it seems that the story could get worse for NASA, because if you know anything about how the scientific community operates, you know that when someone makes a really bold claim (such as how the NASA researchers did) then other scientists are going to want to review the work & offer criticism.  Well, upon doing so, there has been some quite withering criticism coming from many DNA & biochemistry experts about the manner in which the NASA researchers conducted their work…

Read the rest of this entry »

Posted in aliens & UFOs, media woo, space | Tagged: , , , , , , , , , , , , , , , , , , , , , , , , , , | 1 Comment »

 
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