To continue the story, several of us asked "why". And compared the data we got, from the data we were EXPECTED to get (and 20 years of previous classes got. . . )
The difference was more sodium and aluminum in the mineral profiles we found. These were all Feldspars, our results all tended towards orthoclase feldspars, rather than the actual plagioclase feldspars, which have higher calcium content.
So the question became, if there was more aluminum and sodium than expected, and the sample hadn't changed, then the mounting matrix (i.e. the generic office rubber cement) had to be the change. We sent the old, dried-up jar, and the current jar. They found a slightly higher concentration of salt, and metallic aluminum contamination. No clue on how the Chem Department did the analysis, but I know the graduating Chem majors got handed the project as an exercise. . .
And that's the rest of the story. Or, in the short version, Science, Bitches! (grin)
Indeed. Carbon Credits are, effectively, the return of the selling of Indulgences. It's just the Church of Gaia, not the Catholic Church
Techniques are not materials. We only found out about the change of ingredient vendor AFTER the Chemistry Department found traces of metallic aluminum in the cement. We then queried the producer of the cement, and they told us that, based on the lot number on the jar, that was with the new ingredient vendor.
20+ years, same brand of rubber cement, new jar every year or two.
. . . or that an unknown and unrecognized variable is at play.
Mind you, this goes back 40 years, but in my undergrad days, we were required to do a needle powder mount of a ground mineral, and use it in an x-ray diffractometry device. in order to identify the mineral by diffraction patterns.
The year my class did it, we were **all** off by about 5-6% from the reference shots, made years earlier (the sample sources remained the same). Turns out the manufacturer of the adhesive we used for the powder mounts (it was office-type rubber cement) had undergone a minor formula change, they had a new source of one ingredient, which had some metal dust contamination.
We had students doing the same experiment for 20 years previously, used identical techniques, and we STILL got different results. And we wouldn't have figured it out, if one of the TAs recalled that she had to get a new jar of rubber cement, the old one had solidified. . . . and it still took comparative chemical analyses of two different needle mounts of the same sample, but different years, to identify the difference.
Humans could be extinct in less than 200 years.
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Remember, if you want a species wiped out, call SMOD. 1-800-SCREAMING DEATH
I beg to differ. That's where I met my wife, 20 years ago. I have a number of friends who met their spouse online. I even know a couple who met online BEFORE the Net, on CompuServe.
There are real women, and real men, on the net. But you generally need to be a decent person to connect with them . . . .
The reason why worry kills more people than work is that more people worry than work.