To the best of my knowledge, this is the first time a study has linked BPA exposure to health issues in humans. Here you Go…

Among the more esoteric search topics that bring visitors to SierraDescents is the question of the scent of HDPE water bottles.

Do HDPE water bottles really smell bad, people wonder? Or was that just a marketing pitch started by the creators of Lexan?

Here at the world-renowned SierraDescents Institute for Plastic Odor Research (SIPOR), I decided to create an elaborate experiment to answer that question once and for all (more…)

Perhaps by now you’ve heard the radio spot on KFI AM 640:

A concerned female voice warns consumers: ‘Soon, many common everyday products could disappear from grocery store shelves all across California’.

What’s the threat, you ask?

Those dastardly Sacramento Politicians are trying to ban BPA—a chemical that has been safely used for 50 years (the ad assures) in plastic products like reusable water and baby bottles (more…)

The Freakonomics Blog at NYT has an interesting write-up of what they call Beauty Premiums: the benefits enjoyed by being attractive.

One of the most objective ways to measure beauty’s benefit is to simply look at wages, and this is what the Freakos do, in a series of provocative if not outright-disturbing studies.

Tall people turn out to be big beneficiaries, with the interesting stipulation that your height advantage has to begin in adolescence, because lifetime self esteem is heavily developed during this time. If you’re a tall kid, you get a self esteem boost, which translates directly into a wage boost (according to the study).

Another clever study looked at the impact of fluoridated water on future wages (if you’re not aware, fluoridation has a huge impact on teeth, especially for poor people who otherwise can’t afford good dental care). The results of areas which switched to fluoridated water? A wages boost in the next crop of kids.

So if you’re not beautiful, get your teeth fixed. At least you’ll make more money. Then, your self esteem will improve. Which is as good as being beautiful, and even if it’s not, you’ll have enough money to upgrade your appearance, so there you go.

All this talk of beauty and wages can be discouraging, but according to Freakonomics there is at least one bit of good news: people with unusual or ridiculous names do not suffer a wage penalty (so X-Man McGillicuty has nothing to worry about, apparently).

Here at SierraDescents, I’ve adopted a slightly different strategy: I prefer to simply assume I’m extremely attractive, rather than putting any work into actually being attractive (like wearing expensive clothes, getting cosmetic surgery, showering, combing my hair, etc). I’ve been quite happy with the results—though it is best not to examine yourself in the mirror too closely.

The New York Times is running an article on the epidemic of ACL tears and other injuries in U.S. female athletes.

Female participation in sports in this country is exploding, credited in part to a 1972 law, TITLE X, which mandated equal opportunity in sports to female athletes.

As more and more girls and young women compete in sports, it would be natural to expect to see more female sports injuries. But, as the article points out, female athletes may be uniquely vulnerable to sports injuries. As they hit puberty, physical changes, including the structural design of the body and hormonal differences, take place in women’s bodies (more…)

Nalgene has just announced the phase-out of BPA-containing bottles from its product lineup, including all polycarbonate (Lexan) water bottles.

Any way you put it, this is a stunning reversal from a company that has been an unwaivering advocate for the safety of Lexan/Polycarbonate. For interesting commentary on the subject, see Z Recommends’ article, Hell Just Froze Over.

I’d been working (luckily not too hard) on a prepared statement on water bottles and BPA, which was going to wind up concluding that the safety risks of Lexan bottles are unknown but worrisome, and that better (in terms of functionality) alternatives are available. That argument now seems moot. With Nalgene exiting the BPA market, so to speak, that basically means the industry as a whole will be phasing out production as well.

Along with the announcement, Nalgene has created a new website, Nalgene Choice, featuring information on its replacement products, which will reportedly replicate the clear plastic look and feel of Lexan without the dubious BPA and phthalates.

Before we celebrate too enthusiastically, it’s worth remembering that plastic is not inert where human chemistry is concerned. Even the safest plastics, like HDPE, still contain chemicals of potential worry. Nalgene’s replacement bottle may well be free of BPA but contain some new concern as yet off everyone’s radar.

It is a sad reality that consumer protection in the United States is exceedingly weak right now. Companies are not required to prove their products safe before they hit the market. Our government agencies are particularly ineffective when it comes to issues like BPA, which (IMHO) clearly pose a threat in some circumstances (ie, old damaged bottles, baby bottles), but which also enjoy considerable market support and ambiguous research results.

We’ll be watching closely for information on the new plastic used in the new Nalgene lineup (Tritan Copolyester). This story, I’m sure, will continue.

A new interactive SierraDescents series for Ph D’s and laymen alike:

If a hypothesis cannot be tested, does it have any value?

Advanced discussion: consider the hypothesis being innately untestable, as opposed to currently untestable, as separate cases.

I watched Terminator 3: Rise of the Machines on TV last night. Fox’s new series, ‘The Sarah Connor Chronicles’ debuts next weekend, so expect a lot of terminator promotion in the next seven days.

Compared to the unexpected cult classic of the original Terminator, and the campy fun of its sequel, T2, the third film in the series is difficult to quantify. It was hardly received with critical acclaim. No, the film was largely panned, as was its hero, who was about to embark upon a real-life mission to terminate California’s then-governor, Gray Davis.

And yet for me, T3 is by far the most disturbing film of the bunch. The ending took me completely by surprise. After I saw it the first time, I went into a deep funk, muttering for days about humans, robots, and Armageddon. Without being specific, I’ll reveal that T3’s ending is very, very bleak. It’s also (time travel aside) very, very plausible.

One line in the film bothered me the most. The good terminator tells John Connor, “Judgment Day is inevitable.” Why, I asked? This flew in direct conflict with one of the film series’ primary themes—’There is no Fate but what we Make.’ So why would Armageddon suddenly be inevitable? Where did that come from?

I believe I’ve found an answer, and it comes in an unusual book called Deep Survival: Who Lives, Who Dies, and Why by Laurence Gonzales (more…)