A Grain of Sand

If even you aren't into geology, you're going to want to look at Dr. Gary Greenberg's "A Grain of Sand Picture Gallery" at geology.com. He's taken microscopic photographs of grains of sand, with amazing results.

These photos are a sample of what are included in his book "A Grain of Sand: Nature's Secret Wonder." His website for the book is here. While you're there take a look at some of his other microscopic subjects. The flowers are awesome.

Dr. Greenberg gives one a different view of some of nature's beauty.

History of Science at Princeton

Take a look at History 398 Technologies and Their Societies: Historical Perspectives, taught by Professor Michael S. Mahoney.

This 2006 course website offers an enormous amount of information on the history of science, focusing on technology. Almost all of the links are active, though sadly, a few are broken. Each week has extensive readings and links to material pertinent to the current topic.

One link of note is to The Emergence of Advertising in America: 1850 - 1920 at Duke University. I was not familiar with this archive that contains over 9,000 images in this one collection, plus many more collections. One area which I found very interesting was the collection of advertising cookbooks from 1878 to 1929.

Lifelong learners should find this course an interesting addition to learning resources.