Gleanings of the Week Ending January 23, 2016

The items below were ‘the cream’ of the articles and websites I found this past week. Click on the light green text to look at the article.

Breakthrough discovery reveals how thirsty trees pull water to their canopies – It is cohesion and gravity rather than atmospheric pressure that is the driving principle. I always thought it was due to ‘capillary action’ but that term is not mentioned in the article at all.

Giant Clams Light Up Like Plasma Screens, Only Better – Potential for organic displays…..using the giant clam mechanism for power and color.

Photography in The Parks: Accessible Zion Through the Seasons – Nice to know that Zion has something for everybody. I missed it a few years ago when the government was shut down while I was in the area….want to try again.

How do birds stay warm on a cold winter’s night? – Huddling together seems to be popular. The article suggests providing nesting boxes to help the birds find a good place just after sunset. And another post about birds - Snow birds: 10 birds to look for in winter. The feeders at Sapsucker Woods (Ithaca, NY) have a camera on them; the video feed is here. The birds in this post are not what is visiting my feeder and bird bath right now; I’m seeing cardinals, juncos, blue jays, and doves almost every day.

Scientific Illustrator Hand-Paints Giant Mural Featuring 243 Modern Bird Families – Next time I am in Ithaca NY (Cornell University) – I’ll want to see the mural.

Infographic Offers a Valuable Guide to Feeling Happier in Your Life – Lots of variables…and this is all a matter of statistics. There are happy people that don’t meet all these….and the genetics part is something we can’t change anyway! Another perspective on the same topic from BBC Futures: A 7-day guide to the pursuit of happiness.

Arthropods Abundant in American Homes – The average US household contains 62 distinct families of arthropod species. They range from cockroaches and fleas to carpet beetles and book lice…ants. They are our (mostly) quiet and benign roommates.

Why do we get ‘eye floaters’? – Many people notice them…but they impact vision in very few cases. They are causes when small debris gets into the vitreous humor – the jelly like mass between the retina and the lens in our eyes….that is not replenished or replaced.

The Chemistry of Bread Making – A graphic from Compound Interest.