The Space Age gave us some beautiful, rocket-shaped visions of future cities. But before World War II, people were already imagining sleek, beautiful structures. And floating airports. And air taxis. And Futurama, circa 1939! These are the most eye-popping videos of life in the future, from the 1920s and 1930s.
To the naked eye, your body may not look like the site of much action, but take a closer look and you'll see the microscopic battles being waged every moment of every day, between our bodies' invaders and the systems that fight back.