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What the economy was like in late 1920's for average people and for the wealthy and the factors that made the economy susceptible to the Crash of October 1929.

The four years following the end of the Civil War had a lot of change. Pres. Andrew Johnson tried to re-admit the Southern States, Congress had to change this various other ups and downs.

Give instruction on how to move from an advanced beginner to an intermediate or advanced player

A guided study of Greenblatt's Pulitzer-winning account of how Lucretius's ancient Epicurean poem De Rerum Natura was rediscovered in 1417 and quietly ignited the Renaissance, the Scientific Revolution, and modern secular thought. Examines the book's historical arguments, its contested claims, and what the story reveals about how ideas survive and transform across time.

Learn how to shape woody plants into hedges, screens, trained wall specimens, and sculptural forms using pruning, tying, and grafting techniques refined over centuries. Covers plant physiology, seasonal timing, and step-by-step diagrams for a dozen classic forms from flat espaliers to pleached allées.

A technical and aesthetic course on how smiths, jewelers, and sculptors apply controlled corrosion, heat, wax, and chemical baths to give metal surfaces color, depth, and age. Covers liver of sulfur, ferric nitrate, torch patinas, wax sealing, and how to read and replicate historic surface treatments from reference images.

Move beyond recipes and understand the microbiology and chemistry that determine whether your ferments succeed or fail — covering water activity, pH buffering, alcohol yield, off-flavors, and how to use simple instruments like a refractometer and pH meter to control outcomes. Designed for home brewers, cidermakers, vegetable fermenters, and cheesemakers who want to troubleshoot from first principles.

Between 10,000 and 6,000 BCE, a vast inhabited landmass connected Britain to continental Europe before rising seas swallowed it — and underwater archaeology, sediment cores, and ancient DNA are slowly reconstructing what life there looked like. A fascinating case study in how climate, geography, and migration shaped early human Europe.

Learn how actuaries use mortality tables, loss distributions, and expected value to put a price on risk — and apply that same framework to personal decisions about insurance, retirement planning, and financial risk. No calculus required; the focus is on developing the mental models, not passing an exam.

From paint chips to digital displays, color professionals use spectrophotometers, CIE color spaces, and Delta-E calculations to define and match color with precision — and this course explains the whole system from first principles. Ideal for designers, print professionals, and anyone who has wondered why color looks different on screen versus paper.

Explore the evolutionary biology of viruses — why RNA viruses mutate faster, how spillover events from animals happen, what drives antigenic drift in influenza, and why some pathogens become endemic while others fade. A conceptual course grounded in evolutionary theory, not just disease storytelling.

A guided course built around Isabel Wilkerson's landmark narrative history of six million Black Americans who left the Jim Crow South between 1915 and 1970, examining what the migration reveals about race, class, urban geography, and the forces that still shape American cities today.

Learn to identify minerals by their physical properties — hardness, luster, streak, cleavage, and crystal habit — using systematic keys and well-illustrated reference material, the same way field geologists do. Covers the major rock-forming and collectible minerals, how they form, and where to find them.