Abyssinia Abyssinia, which is intended as a living museum & educational resource on the Science Circle’s OpenSim grid, is my reconstruction of ancient archaeological sites in Tigray (northern Ethiopia) & Eritrea that date from at least 1000 BCE through roughly 800 CE. I excavated at several of these sites decades ago (1969-1972), & now am […]

Understanding Science: The Day the Dinosaurs Died – A Lesson in Planetary Ecology This series of presentations started with the worlds of the very small (particle physics) and very large (our solar system and beyond). Last time we looked at one of the artificial worlds we have created from our knowledge of science, that is, […]