Images

A 1916 photograph of British Army troops using a captured German trench on the Western Front during the First World War (1914-18). One soldier is on sentry duty while his comrades sleep as best they can. Imperial War Museums, London.

A 1916 photograph of a German trench on the Western Front during the First World War (1914-18). (German Federal Archives)

A March 1918 photograph of a British trench on the Western Front of the First World War (1914-18). Features of trench warfare shown include the firing step to allow a soldier to rise above the parapet which is protected with sandbags, a Lewis...

A 1918 photograph showing a British soldier at a sentry post in a front line trench during the First World War (1914-18). The solider has a periscope to safely look over no man's land. (Imperial War Museums)

An aerial view of trenches on the Western Front in 1916 during the First World War (1914-18). The upper line shows British trenches and the lower line German ones. Location: east of Picantin and Tilleloy. Imperial War Museums, London.

Aztec temple of Huitzilopochtli, book illustration by unknown artist, included in the Codex Tovar by Juan de Tovar, p. 244, 1582. John Carter Brown Library, Providence.

A charm of hummingbirds, book illustration by unknown artist, included in Bernardino de Sahagún's Florentine Codex, "Book XI: Natural Things," p. 53, 1577. Medicea Laurenziana Library, Florence.

Hummingbird drinking nectar, book illustration by unknown artist, included in Bernardino de Sahagún's Florentine Codex, "Book XI: Natural Things," p. 54, 1577. Medicea Laurenziana Library, Florence.

Aztec god Quetzalcoatl and a hummingbird, book illustration included in the Codex Magliabechiano by unknown artist, p. 61r, c. 1550. Biblioteca Nazionale Centrale, Florence.

Aztec supreme god Huitzilopochtli with hummingbird-inspired look, book illustration by unknown artist, included in the Codex Tovar by Juan de Tovar, p. 240, 1582. John Carter Brown Library, Providence.