Questioning Sunscreen Wisdom 
The story, as it is usually told, holds that exposing flesh to sun without sunscreen is nothing but an invitation to disaster. Cover up, goop up and stay in the shade, lest the sun get you. But how safe is that sunscreen? And what do the statistics and the science tell us about its bottom-line benefits? Asking those questions and coming up with some well-researched, but controversial answers is Rowan Jacobsen at Outside: https://www.outsideonline.com/2380751/sunscreen-sun-exposure-skin-cancer-science

Porphyromonas Gingivalis and Alzheimer’s 
A growing body of evidence suggests that the bacterium which causes gingivitis, Porphyromonas gingivalis, plays a pivotal role in the development of amyloid plaques on the brain, a defining characteristic of Alzheimer’s. This has led to speculation that eliminating the bacteria might staunch the disease. New Scientist has the details: https://www.newscientist.com/article/2191814-we-may-finally-know-what-causes-alzheimers-and-how-to-stop-it/

Hospital Price Lists Found Arcane and Vague 
And that’s not to mention pricey; e.g. $32,456.66 “headaches.” A federal law, which took effect at the first of the year, mandates hospitals make available price lists for common procedures. Ars Technica takes a look at how all of that is going: https://arstechnica.com/science/2019/01/new-hospital-price-lists-are-massive-spreadsheets-full-of-gibberish/

Muscles May Have a Shortcut to Regaining Strength 
Just in time for that soon-to-come moment of getting back out after a winter lay-off, here’s news that makes the quest to get back in shape look a little less Sisyphean. As NPR reports, muscle cell nuclei appear to have a trick that helps: https://www.npr.org/sections/health-shots/2019/01/25/688838589/muscles-may-preserve-a-shortcut-to-restore-lost-strength So much for excuses, eh?