15 old photos that show how much the world has changed (16 photos)
Old photographs hold secrets and mysteries, and sometimes they teach more than any history book. They depict fascinating and mysterious events that will make you go back to distant times. 
1. The Louvre after the most valuable works of art were hidden in the basements, before the Nazi invasion of France, September 1939 
2. Haircut guide. Photoplay Magazine, June 1924 
3. Circassian Woman, North Caucasus, 1917 
4. 250MB Hard Drive, 1979 year 
5. Volunteers of the Venezuelan Red Cross, 1925 
6. The last known photograph of Mark Twain 
The writer said: "I came with Halley's Comet in 1835. It will appear next year, and I hope to go with it." Twain's prediction proved accurate, as he died of a heart attack on April 21, 1910.
7. Persian shepherds from northern Iran, wearing traditional heavy wool cloaks, preparing to shear sheep, 1952 
8. Submarine control room, 1918 
9. A boy receiving sun therapy in London, England, 1928 
10. A glass of wine at the Eiffel Tower in Paris, 1920s 
11. Japanese pilot, 1914 year 
12. One Hundred and Thirty Steps. That's how many steps it took to get to the top or bottom of the Escadinhas da Saúde, the longest staircase in Lisbon 
Literally translated, it means "small steps to health."
13. Coca-Cola tasting in France, 1950 
14. Bison team 19th century Sioux Falls, South Dakota, 1885 
15. Young gypsy couple, 1890 year 
