#21 Blackfoot Indians atop a hotel roof, a moment of history
#22 Irish Guards’ drummer boy with the regiment’s Irish Wolfhound mascot, Waterford Barracks, February 21, 1917
#23 Women ice carriers showcasing strength, September 1918
#24 A hot potato vendor offers warmth and snacks to Manhattan's streets, 1892.
#25 Progressive girls learning auto mechanics in high school, 1927
#26 An upper-class woman in the Ottoman Empire, early 1900s
#27 How infants traveled by plane in the 1960s
#28 Tippi Hedren with her pet tiger, 1982
#29 Main Street in Deadwood, Dakota: A look at 1877 and today
#30 19-year-old Ava Gardner's MGM employment portrait, 1941
#31 VW buses lined up at the factory, 1960s
#32 Neil Armstrong captured by Buzz Aldrin after the first moonwalk, July 20, 1969
#33 Making airline reservations before computers, 1945
#34 The Statue of Liberty photographed in Paris before its journey to New York, 1884
#35 A lively saloon in Wyoming during the late 1800s
#36 Two young boys on the streets of London, 1902
#37 A little girl amid the Great Depression, 1930s
#38 The USS Langley, the first American aircraft carrier, converted from a coal ship, 1928
#39 Frozen Niagara Falls, a chilling scene from 1911
#40 Children balancing school and work: Shucking oysters before and after class, late 19th century
