AVE6327549: United States, 1970s: man sprays white paint on mine wall / Bridgeman Images

AVE6327695: Russia, 1950s: Tsiolkovsky's granddaughter talks to a crowd in his hometown of Kaluga / Bridgeman Images

AVE6327594: Puerto Rico, 1960s: Sign on building "CENTRO DE SALUD" / Bridgeman Images

AVE6327609: United States, 1930s: Two men set up an launch a missile that quickly falls to the ground / Bridgeman Images

AVE6327630: Germany, 1940s: German police and scientists discuss plans for army weapons / Bridgeman Images

AVE6327669: United States, 1950s: Long shot of Moscow / Bridgeman Images

AVE6327672: United States, 1950s: Woman in lab puts dog on scale / Bridgeman Images

AVE6327675: United States, 1950s: Cloud forming after a nuclear explosion / Bridgeman Images

AVE6327681: Russia, 1950s: Flocks of students wait to enter school / Bridgeman Images

AVE6327696: United States, 1950s: Diagram showing the spread of radioactive particles from a cloud across the land / Bridgeman Images

AVE6327740: 1970s: Woman drives bus / Bridgeman Images

AVE6327726: United States, 1950s: The German Space Club members hold a meeting to discuss their future / Bridgeman Images

AVE6327788: United States, 1990s: Image of universe / Bridgeman Images

AVE6327744: United States, 1950s: German technology is developed in the town of Peenemunde lead by Dr / Bridgeman Images

AVE6327753: United States, 1990s: Space shuttle launching / Bridgeman Images

AVE6327866: America, c.1990s: Robotic arm controllers maneuver astronaut, on STS-49 mission, toward a rotating satellite / Bridgeman Images

AVE6327816: 1950s: Woman and male professor stand in front of a chalkboard / Bridgeman Images

AVE6327819: America, c.1990s: Close up of astronaut attached to robotic arm outside of space shuttle Endeavour / Bridgeman Images

AVE6327935: 1960s: Girl picks up glass tube / Bridgeman Images

AVE6327766: United States, 1990s: Magnified views of cells / Bridgeman Images

AVE6327769: United States, 1990s: Spiders on web / Bridgeman Images

AVE6327805: America, c.1990s: Inside of NASA mission control center / Bridgeman Images

AVE6327870: 1950s: Young woman speaks and gestures at lectern / Bridgeman Images

AVE6327903: 1960s: Boy gathers glassware in arms / Bridgeman Images

AVE6327838: 1950s: Young man stands in front of chalkboard in college classroom / Bridgeman Images

AVE6327975: United States, 1950s: Close up of countdown / Bridgeman Images

AVE6327931: 1960s: Hands pour chemical into graduated cylinder / Bridgeman Images

AVE6327940: America, c.1990s: Three astronauts, attached to robotic arms, work on exterior of space shuttle Endeavour / Bridgeman Images

AVE6327946: America, c.1990s: Three astronauts, attached to robotic arms, receive telecom instructions while working with satellite near exterior of space shuttle Endeavour / Bridgeman Images

AVE6327949: America, c.1990s: Oceanic earth crust from the perspective of space shuttle Endeavour / Bridgeman Images

AVE6327958: America, c.1990s: Three astronauts work on exterior of space shuttle Endeavour / Bridgeman Images

AVE6327985: America, c.1990s: Three astronauts on exterior of space shuttle Endeavour as Intelsat VI satellite slowly moves into frame from top of frame / Bridgeman Images

AVE6328032: United States, 1940s: Two teenagers talking / Bridgeman Images

AVE6328041: United States, 1940s: Shots of posters / Bridgeman Images

AVE6328044: United States, 1940s: Coach talking to players / Bridgeman Images

AVE6328003: America, c.1990s: Three astronauts on exterior of space shuttle Endeavour as Intelsat VI satellite hovers above them / Bridgeman Images