August 24, 2017 In the Path of Totality Science

In the Path of Totality

I first saw a total eclipse in 1991, in Cabo San Lucas Mexico, and while I remember specific details of the event (more...)...

Posted in Science | 3 Comments
June 5, 2012 Venus Alert Science

Venus Alert

Yes: Venus! A thoughtful neighbor stopped by with black glasses from Griffith Park Observatory and told us that Venus is currently visible crossing the sun. My son and I jumped outside with glasses plus the Nikon and the big lens and every filter in the house. It took us several tries, but here it is, (more...)...

Posted in Science | 0 Comments
April 1, 2011 Thoughts On That Helmet Article... Science

Thoughts On That Helmet Article…

An article in Ski Canada Magazine examining helmet use stats in the US is generating quite a bit of buzz right now in the ski world. I’ve read the article and given it some thought, and my impression is that it’s easy to misread and/or misinterpret the article’s conclusions. Let’s take a closer look at (more...)...

Posted in Science, Skiing | 5 Comments
November 3, 2010 Health

BPA Receipts

Here’s another way that most ubiquitous of not-so-friendly chemicals, BPA, can end up in your body: via store receipts. Turns out that the thermal papers used to print most receipts are heavily infused with the chemical (up to 2% by weight, apparently). Tests have revealed that the BPA easily rubs off on your fingers as (more...)...

Posted in Health, Science | 0 Comments
November 9, 2009 Health

BPA in the NY Times

NY Times columnist Nicholas Kristoff writes about the ubiquity of BPA in our bodies, plus a gaggle of new studies linking BPA exposure to a variety of abnormalities in test animals. If you’ve been following the BPA Saga (including this impressive bit of corporate nastiness by Sigg), you’ll see that the latest research keeps upping (more...)...

Posted in Health, Science | 6 Comments
May 8, 2008 Health

Female Athletes and ACL Tears

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 (more...)...

Posted in Health, Science | 0 Comments
April 21, 2008 Gear

Nalgene Phases out BPA Bottles

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 (more...)...

Posted in Gear, Science | 0 Comments
September 5, 2007 Science

Global Dimming

PBS’ Nova is running a new episode on a phenomenon they’ve dubbed, “Global Dimming”—the reduction of the sun’s intensity due to atmospheric pollution. On its surface this might seem like a perfectly obvious consequence of pollution, but, as the documentary demonstrates, scientists are making astonishing discoveries about its true scope (more...)...

Posted in Science | 0 Comments

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About SierraDescents

When there is snow, SierraDescents is Andy Lewicky's California backcountry skiing and mountaineering website. Without snow, sierradescents becomes an ill-tempered hiking and climbing blog.

Pray for snow.