October 13, 2014
From Native Americans: Portraits From a Century Ago, one of 34 photos. Here, a  portrait of a Native American named Big Head, ca. 1905. (Library of Congress/Edward S. Curtis)

From Native Americans: Portraits From a Century Ago, one of 34 photos. Here, a portrait of a Native American named Big Head, ca. 1905. (Library of Congress/Edward S. Curtis)

August 20, 2014
From First Flight with the Wright Brothers, one of 18 photos. Wilbur Wright pilots a full-size glider down the steep slope of Big Kill Devil Hill in Kitty Hawk, North Carolina, on October 10, 1902. This model was the third iteration of the Wright brothers’ early gliders, equipped with wings that would warp to steer, a rear vertical rudder, and a forward elevator. (Library of Congress)

From First Flight with the Wright Brothers, one of 18 photos. Wilbur Wright pilots a full-size glider down the steep slope of Big Kill Devil Hill in Kitty Hawk, North Carolina, on October 10, 1902. This model was the third iteration of the Wright brothers’ early gliders, equipped with wings that would warp to steer, a rear vertical rudder, and a forward elevator. (Library of Congress)

August 4, 2014
From The Soviet War in Afghanistan, 1979 - 1989, one of 41 photos. A low-flying Afghan helicopter gunship in snow-capped valley along Salang highway provides cover for a Soviet Convoy sending food and fuel to Kabul. Afghanistan, on January 30, 1989. The convoy was attacked by Mujahideen guerrillas with rockets further up the highway, with Afghan government troops returning fire with artillery. (AP Photo/Liu Heung Shing)

From The Soviet War in Afghanistan, 1979 - 1989, one of 41 photos. A low-flying Afghan helicopter gunship in snow-capped valley along Salang highway provides cover for a Soviet Convoy sending food and fuel to Kabul. Afghanistan, on January 30, 1989. The convoy was attacked by Mujahideen guerrillas with rockets further up the highway, with Afghan government troops returning fire with artillery. (AP Photo/Liu Heung Shing)

July 30, 2014
From Hollywood Streets, 1979-1983, one of 29 photos. Punk rock photographer and Hollywood denizen Rooh Steif on the bus in Hollywood. (© Matt Sweeney)

From Hollywood Streets, 1979-1983, one of 29 photos. Punk rock photographer and Hollywood denizen Rooh Steif on the bus in Hollywood. (© Matt Sweeney)

June 29, 2014
From World War I in Photos: A Century Later, one of 45 photos. Tree limbs surround the World War One Canadian Memorial, also known as the ‘Brooding Soldier’ in St. Julien, Belgium on March 7, 2014. The statue is a memorial to the Canadian troops who died in the first gas attacks of the First World War in 1915. (AP Photo/Geert Vanden Wijngaert) 

Today’s entry is part 10 of a 10-part series on World War I.

From World War I in Photos: A Century Later, one of 45 photos. Tree limbs surround the World War One Canadian Memorial, also known as the ‘Brooding Soldier’ in St. Julien, Belgium on March 7, 2014. The statue is a memorial to the Canadian troops who died in the first gas attacks of the First World War in 1915. (AP Photo/Geert Vanden Wijngaert)

Today’s entry is part 10 of a 10-part series on World War I.

June 22, 2014
From World War I in Photos: The Western Front Part II, and Armistice, one of 45 photos. A soldier of Company K, 110th Regt. Infantry (formerly 3rd and 10th Inf., Pennsylvania National Guard), just wounded, receiving first-aid treatment from a comrade. Varennes-en-Argonne, France, on September 26, 1918. (U.S. Army/U.S. National Archives) 

Today’s entry is part 9 of a 10-part series on World War I, which will be posted every Sunday until June 29.

From World War I in Photos: The Western Front Part II, and Armistice, one of 45 photos. A soldier of Company K, 110th Regt. Infantry (formerly 3rd and 10th Inf., Pennsylvania National Guard), just wounded, receiving first-aid treatment from a comrade. Varennes-en-Argonne, France, on September 26, 1918. (U.S. Army/U.S. National Archives)

Today’s entry is part 9 of a 10-part series on World War I, which will be posted every Sunday until June 29.

June 15, 2014
From World War I in Photos: Global Conflict, one of 45 photos.  Annamese (colonial troops from French Indochina) disembarking at Camp Saint-Raphael. Over the course of the war, nearly 100,000 Indochinese were deployed in Europe, most as laborers, but several thousand also served in combat battalions. (Bibliotheque nationale de France) 

Today’s entry is part 8 of a 10-part series on World War I, which will be posted every Sunday until June 29.

From World War I in Photos: Global Conflict, one of 45 photos. Annamese (colonial troops from French Indochina) disembarking at Camp Saint-Raphael. Over the course of the war, nearly 100,000 Indochinese were deployed in Europe, most as laborers, but several thousand also served in combat battalions. (Bibliotheque nationale de France)

Today’s entry is part 8 of a 10-part series on World War I, which will be posted every Sunday until June 29.

June 8, 2014
From World War I in Photos: The War at Sea, one of 45 photos. The former German submarine UB 148 at sea, after having been surrendered to the Allies. UB-148, a small coastal submarine, was laid down during the winter of 1917 and 1918 at Bremen, Germany, but never commissioned in the Imperial German Navy. She was completing preparations for commissioning when the armistice of November 11 ended hostilities. On November 26, UB-148 was surrendered to the British at Harwich, England. Later, when the United States Navy expressed an interest in acquiring several former U-boats to use in conjunction with a Victory Bond drive, UB-148 was one of the six boats allocated for that purpose. (US National Archives) 

Today’s entry is part 7 of a 10-part series on World War I, which will be posted every Sunday until June 29.

From World War I in Photos: The War at Sea, one of 45 photos. The former German submarine UB 148 at sea, after having been surrendered to the Allies. UB-148, a small coastal submarine, was laid down during the winter of 1917 and 1918 at Bremen, Germany, but never commissioned in the Imperial German Navy. She was completing preparations for commissioning when the armistice of November 11 ended hostilities. On November 26, UB-148 was surrendered to the British at Harwich, England. Later, when the United States Navy expressed an interest in acquiring several former U-boats to use in conjunction with a Victory Bond drive, UB-148 was one of the six boats allocated for that purpose. (US National Archives)

Today’s entry is part 7 of a 10-part series on World War I, which will be posted every Sunday until June 29.

June 5, 2014
From Scenes From D-Day, Then and Now, one of 21 photo pairs. A composite image of the seafront of Weymouth, England — in June of 1944 (left) and 70 years later, on April 5, 2014. In 1944, US troops on the Esplanade were on their way to embark on ships bound for Omaha Beach for the D-Day landings in Normandy. The Allied invasion to liberate mainland Europe from Nazi occupation during World War II took place on June 6, 1944. (Galerie Bilderwelt, 1944/Peter Macdiarmid, 2014/Getty Images)

From Scenes From D-Day, Then and Now, one of 21 photo pairs. A composite image of the seafront of Weymouth, England — in June of 1944 (left) and 70 years later, on April 5, 2014. In 1944, US troops on the Esplanade were on their way to embark on ships bound for Omaha Beach for the D-Day landings in Normandy. The Allied invasion to liberate mainland Europe from Nazi occupation during World War II took place on June 6, 1944. (Galerie Bilderwelt, 1944/Peter Macdiarmid, 2014/Getty Images)

June 4, 2014
From Tiananmen Square, 25 Years Ago, one of 44 photos.  A Chinese man stands alone to block a line of tanks heading east on Beijing’s Cangan Boulevard in Tiananmen Square, on on June 5, 1989. The man, calling for an end to violence and bloodshed against pro-democracy demonstrators, was pulled away by bystanders, and the tanks continued on their way. More on this iconic image and the still-anonymous “tank man” here. (AP Photo/Jeff Widener)

From Tiananmen Square, 25 Years Ago, one of 44 photos. A Chinese man stands alone to block a line of tanks heading east on Beijing’s Cangan Boulevard in Tiananmen Square, on on June 5, 1989. The man, calling for an end to violence and bloodshed against pro-democracy demonstrators, was pulled away by bystanders, and the tanks continued on their way. More on this iconic image and the still-anonymous “tank man” here. (AP Photo/Jeff Widener)

June 2, 2014
From 1964: The New York World’s Fair, one of 32 photos. The Unisphere, the 12-story stainless-steel globe at the heart of the 1964 World’s Fair, and its symbol around the world. (CC BY SA Flickr user PLCjr)

From 1964: The New York World’s Fair, one of 32 photos. The Unisphere, the 12-story stainless-steel globe at the heart of the 1964 World’s Fair, and its symbol around the world. (CC BY SA Flickr user PLCjr)

June 1, 2014
From WWI in Photos: Soldiers and Civilians, one of 45 photos. French soldiers stand in a relaxed group wearing medals. The medals appear to be the Military Medal, established on 25th March, 1916, for acts of bravery. They have probably been awarded for their part in the Battle of the Somme. The French helmets, with their very distinct crests, can be seen clearly. (National Library of Scotland) 

Today’s entry is part 6 of a 10-part series on World War I, which will be posted every Sunday until June 29.

From WWI in Photos: Soldiers and Civilians, one of 45 photos. French soldiers stand in a relaxed group wearing medals. The medals appear to be the Military Medal, established on 25th March, 1916, for acts of bravery. They have probably been awarded for their part in the Battle of the Somme. The French helmets, with their very distinct crests, can be seen clearly. (National Library of Scotland)

Today’s entry is part 6 of a 10-part series on World War I, which will be posted every Sunday until June 29.

May 30, 2014
From 1964: Alaska’s Good Friday Earthquake, one of 36 photos. The rails in this approach to a railroad bridge near the head of Turnagain Arm, southeast of Anchorage, were torn from their ties and buckled laterally by movement of the riverbanks during a massive earthquake on March 27, 1964. The bridge was also compressed and developed a hump from vertical buckling. (U.S. Geological Survey)

From 1964: Alaska’s Good Friday Earthquake, one of 36 photos. The rails in this approach to a railroad bridge near the head of Turnagain Arm, southeast of Anchorage, were torn from their ties and buckled laterally by movement of the riverbanks during a massive earthquake on March 27, 1964. The bridge was also compressed and developed a hump from vertical buckling. (U.S. Geological Survey)

May 29, 2014
From 1964: Beatlemania, one of 42 photos. The Beatles leave London airport in 1964. From left: John Lennon, Ringo Starr, Paul McCartney and George Harrison. Enthusiastic fans welcomed the Beatles in airports and concert halls around the world in 1964, as Beatlemania swept the globe. (AP Photo)

From 1964: Beatlemania, one of 42 photos. The Beatles leave London airport in 1964. From left: John Lennon, Ringo Starr, Paul McCartney and George Harrison. Enthusiastic fans welcomed the Beatles in airports and concert halls around the world in 1964, as Beatlemania swept the globe. (AP Photo)

May 28, 2014
From 1964: Civil Rights Battles, one of 42 photos. A woman who stayed at the riot scene in Dixmoor, IL, August 17, 1964, is carried to a police van. Police had ordered all persons indoors in the race riot area. Those who didn’t, were taken into custody in Dixmoor, a Chicago suburb. More than twelve were arrested. A number of large cities across the eastern U.S. experienced race-related riots during the summer of 1964. (AP Photo)

From 1964: Civil Rights Battles, one of 42 photos. A woman who stayed at the riot scene in Dixmoor, IL, August 17, 1964, is carried to a police van. Police had ordered all persons indoors in the race riot area. Those who didn’t, were taken into custody in Dixmoor, a Chicago suburb. More than twelve were arrested. A number of large cities across the eastern U.S. experienced race-related riots during the summer of 1964. (AP Photo)