Image of nuclear explosion

US Department of Energy (Public Domain)

Image of a dodo bird

A modern reconstruction of the extinct dodo • Photo by Michael Coghlan (CC BY-SA 2.0)

Image of many dollar bills

Photo by Sharon McCutcheon on Unsplash

Image of Richard Feynman

Richard Feynman, explaining a joke in 1964 (Public Domain)

Image of a pair of gulls

Photo by Linnaea Mallette (Public Domain)