Examine the human physiologic changes that occur in astronauts while they are in microgravity and see how the human body re-adapts to Earth’s environment. This video Features astronauts from STS-51 explaining research conducted aboard the Space Shuttle that examined the six physiological systems (the heart, lungs, blood, muscles, cells and the immune system). We digitized […]
The film discusses the historical development of American cities, highlighting how geography influenced early trading centers. It emphasizes the rapid,