AVE6320063: United States, 1960s: NASA astronaut training underwater for space walks / Bridgeman Images

AVE6320073: United States, 1960s: View from above as NASA space rocket prepares to take off / Bridgeman Images

AVE6320074: United States, 1960s: Slow motion shot of scaffold collapsing as NASA rocket launches / Bridgeman Images

AVE6320075: United States, 1960s: View from above as NASA space rocket lifts off from ground and surrounding scaffolding / Bridgeman Images

AVE6320079: United States, 1960s: Flames fading as NASA rocket travel up through sky towards space / Bridgeman Images

AVE6320081: United States, 1960s: External view of space ship through window / Bridgeman Images

AVE6320197: Europe, 1940s: building exterior at night / Bridgeman Images

AVE6320205: Europe, 1940s: title for Christmas 1940 / Bridgeman Images

AVE6320206: Europe, 1940s: girl gives father a hug and kiss / Bridgeman Images

AVE6320214: Europe, 1940s: buildings collapse in fire / Bridgeman Images

AVE6320215: Europe: 1940s: London city buildings on fire, view from above / Bridgeman Images

AVE6320224: Europe, 1940s: abandoned tanks on roads of France / Bridgeman Images

AVE6320229: Europe, 1940s: women volunteers pull on ropes for balloons / Bridgeman Images

AVE6320235: Europe, 1940s: soldiers on beach / Bridgeman Images

AVE6320239: Europe, 1940s: British ships in English Channel / Bridgeman Images

AVE6320250: Europe, 1940s: spitfire planes in sky / Bridgeman Images

AVE6320259: Europe, 1940s: ammunition factory in England / Bridgeman Images

AVE6320260: Europe, 1940s: man runs and blows whistle / Bridgeman Images

AVE6320263: Europe, 1940s: pilot stands on ground and talks / Bridgeman Images

AVE6320267: Europe, 1940s: fire fighters in London rehearse drill / Bridgeman Images

AVE6320293: Europe, 1940s: man draws enemy position on map / Bridgeman Images

AVE6320297: United States, 1980s: scientist looks at petri dishes under microscope / Bridgeman Images

AVE6320299: United States, 1980s: micro cinematography of leucocytes in blood vessels / Bridgeman Images

AVE6320300: United States, 1980s: normal cells divide in situ / Bridgeman Images

AVE6320306: United States, 1980s: animation of immune system in human body / Bridgeman Images

AVE6320310: United States, 1980s: defender cell makes cells to help kill invader / Bridgeman Images

AVE6320316: United States, 1980s: cartoon phagocyte eats virus / Bridgeman Images

AVE6320317: United States, 1980s: suppressor cell cartoon character produces lymphtoxin / Bridgeman Images

AVE6320324: United States, 1980s: close up blood pressure cuff on female patient / Bridgeman Images

AVE6320327: Europe, 1940s: citizens sleep on Leicester Square underground station platform during air raid / Bridgeman Images

AVE6320339: Europe, 1940s: pilots in plane at night / Bridgeman Images

AVE6320341: Unites States, 1970s: round circle on dark background / Bridgeman Images

AVE6320352: Unites States, 1970s: man turns button on machine / Bridgeman Images

AVE6320359: Unites States, 1970s: Men prepare NOAA vessel for expedition / Bridgeman Images

AVE6320366: Unites States, 1970s: lava flows from volcano / Bridgeman Images

AVE6320369: Unites States, 1970s: red buoy in waves / Bridgeman Images