15. German worker refusing to salute in 1936
Three years before World War Two broke out and three years after the Nazis came to power, this photo depicts a crowd of Germans giving the Nazi salute. With one exception, that is, who’s believed to be August Landmesser. The shipyard worker was eventually imprisoned for his illegal relationship with a Jewish woman and later died while serving in a penal battalion.
14. A family photo on the moon
If humans ever establish a colony on the moon, Charles Duke can claim to have started the trend. In 1972 the astronaut left a family photo on the moon’s surface during the Apollo 16 mission. He subsequently took a picture of it for posterity. So when you put up your family snap in your moon habitat decades from now, think of Duke.