Engraved illustration of 19th-century scientists at work in a quarry

"Strata of Tilgate Forest" from "Illustrations of the Geology of Sussex" (1827)

Aerial image of St. Peter's Square at the Vatican

Photo by Caleb Miller on Unsplash

Image of modern Dublin cityscape at night

Samuel Beckett Bridge, Dublin • Photo by Saad Chaudhry on Unsplash

Image of a group of young people star-gazing.

Photo by Greg Rakozy on Unsplash

Image of a fossilized marine animal.

A fossilized trilobite preserved in Burgess Shale • Photo by Smith609 (CC BY 2.5)

Image of a brightly-colored kite flying in a blue sky

Photo by Charlotte Harrison on Unsplash

Image of a man's hand backlit by a soft light

Photo by Jackson David on Unsplash

Image of ramblers walking on a footpath in the woods

Ramblers on a public footpath • Photo by Andrew Bowden (CC BY-SA 2.0)

Image of Teilhard de Chardin in a thoughtful pose

Teilhard de Chardin • Archives des jésuites de France (CC BY-SA 3.0)

Oil painting of a Victorian woman lost in thought

"A Day Dream" by Edward John Poynter (1863)