Two childhood friends meet during a protest. One is a factory worker, the other is a riot officer.

An illustration shows a monk seducing a nun, who becomes pregnant and has an illegitimate baby. She then disposes of the baby in the privy (toilet). From the Miracles de Notre Dame, 71 A 24. Royal Library of the Netherlands

Landsknecht’s dagger from Germany, mid 16th century. The Louvre.

A union soldier goofing around while getting his portrait taken. In most old photos — those taken in the 19th century and early 20th century — people aren't smiling or goofing around, which makes this photo so much more striking.

Aviation parade at the Tushino Military Airport, Moscow, USSR, 1933.

"The Veiled Christ" by Giuseppe Sanmartino, 1753. It was created with a single block of marble.

Kids playing by the ocean, 1896

Ballgame Palma, c. 900–1100 Mexico, Gulf Coast, Classic Veracruz style Cleveland Art Museum

Auto wreck in Washington, 1921.

The Golden Gate Bridge under construction in 1937.

A 22-year-old Ernesto Guevara setting out out on a solo motorbike trip through the northern rural provinces of Argentina, 1950.

Two Ancient Roman dodecahedra and an icosahedron from ancient Rome. Rheinisches Landesmuseum Bonn, Germany. Learn more: bit.ly/3owU4Ar

Street dance in Drury Lane, London 1896

Collecting light - Inside the Karnak temple in Luxor, Egypt. Photo: Guillaume Roche

Project Apollo Capsule Mockups Made of Wood, 1961. Photo by Fritz Goro.

Times Square, 1921

Sainte-Chapelle, Paris, France. Photo by Juan Sánchez.

Astonishing detail on this Gold diadem with delicate floral patterns uncovered in Canosa, Italy, 3rd-2nd century BCE, Archaeological Museum of Taranto.

A family is forced to leave their home during the Great Depression, Pittsburg County, Oklahoma, June, 1938.

Just two friends sharing a cigarette during the Tour de France, 1920s.