Coursera - May 2015

Both of the courses from April are finishing up and I’m determined to not load myself up with new courses in May because I have so many outdoor activities planned for the month.

I did enjoy both of the April courses. Maps and the Geospatial Revolution course is immediately applicable to a Tree Tour I am doing as a project for my Master Naturalist certification. It will include a map, of course.

The Water in the Western US course was good on a number of levels. There was a segment on how they are adding sediment back to the water flowing into the Grand Canyon to rebuild the sandbars there (and it seems to be working)….brining back memories of the place from earlier this year. One memorable and scary factoid from the course: The Central Valley of California has subsided significantly since the 50s and 60s and is now below sea level; levees are all that separate it from San Francisco Bay….all the fresh water in that area (water supply for San Francisco) could become saline within days if an earthquake caused those levees to fail!

Gleanings of the Week Ending April 18, 2015

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.

10 Geological Forms we’ve studied for Years and Still Don’t Understand - Some of the forms we thought we understood….only to discover additional mechanisms played a role (in canyon formation, for example).

Why the FDA Has Never Looked At Some of the Additives in Our Food - In the past 5 decades, the number of food additives has skyrocketed from about 800 to 10,000….and many of them have come to market under the ‘generally recognized as safe’ provision in the FDA safety-review process. Some of them have caused severe allergic reactions or long term health effects. This is a scary aspect to our food system. The article prompted to look more closely at the processed foods I buy and try to skew my food purchases to whole foods that I prepare myself.

Hawksbill Turtles: A Rare Good News Story for a Species on the Brink - Hurray!

This Elevation Map of Mars Makes the Red Planet Much More Colorful - From the German space agency

This 19th Century Art Is Made Entirely Out Of Butterfly Wings - I’d much rather see live butterflies!

A Chart Showing You How Much Water It Takes To Grow All the Food You Eat - Were there any surprises on this chart?  Each circle represents the gallons of water per ounce of a food. I found myself wanting more; I wanted to compare whether soymilk (on the graphic) took more or less water than almond milk (not on the chart).

Exceptionally preserved fossil gives voice to ancient terror bird - The fossil is from South America of a bird flightless that was 4 feet tall and is the most complete ‘terror bird’ discovered with 90% of the skeleton preserved.

Top 5 Interesting Nests in North America - It’s the time of year for birds to be building their nests in our area….and there are some interesting ones in this post.

These Knotted Cords Are a Sophisticated Ancient Counting Tool - The Inca’s knotted counting system…that we still don’t completely understand.

Greatest mass extinction driven by acidic oceans, study finds - A key in the past to understand the impact of ocean acidification.

Gleanings of the Week Ending March 14, 2015

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.

Karnak: Excavation yields 38 artifacts - New techniques and new finds at Karnak.

71% of Investors Are Interested In Sustainable Investing - It’s positive news that more people are voting for sustainability via their investments.

New Study Pinpoints Where Ocean Acidification Will Hit Hardest - Not only hardest…but earliest. The ocean does not acidify uniformly. Estuaries with excess nutrients will acidify more rapidly. Not a good new message for the Chesapeake Bay’s shell fish industry.

Boosting older adults' vision through training - The core of the message from the research was positive but it was frustrating that the next steps were all about more research. If the initial research finding holds - then why is there not already a strategy activity to think through how vision training could be delivered to larger numbers of people at low cost.

By separating nature from economics, we have walked blindly into tragedy - We live in complex world…making decisions based on simplifying assumptions that ignore the environment or economic or social aspects are perilous.

New research into materials for tooth fillings - The composite that is most common right now is problematic because it requires adhesive to bond to the tooth, needs to be illuminated with a lamp to harden, and needs to be replaced more frequently. A new material - glass ionomer cement - may be the filling material of the future.

Widely Used Antibiotics Affect Mitochondria - The environmental accumulation of tetraclines might be harming us in ways that are just now being studied. Scary.

Epoch-defining study pinpoints when humans came to dominate planet Earth - Two dates jump out: 1610 with the irreversible exchange of species between new and old worlds and 1964 associated with the fallout from nuclear weapons testing. Either way - humans have driven Earth into a new epoch…the Anthropocene.

Fun Parks to Visit in the Top 10 Cities for Wildlife - Staycation fodder. There are interesting parks in most areas of the country. These 10 are clearly the tip of the iceberg!

Did Neanderthals make jewelry 130,000 years go? Eagle claws provide clues - From a site in present day Croatia dating from 130,000 years ago.