Activator / Inhibitor

Yayoi Kusama, Rain on the Pacific, 1979.

 Enamel and ink on paperboard. 27 x 24 cm (10⅝ x 9½ in).

Aboriginal dot art by Yirkartu bamba

Ann Arnold (English, 1936-2015)

The Rainbow

Oil on Canvas

Statuette of a Hippopatamus, Egypt, Second Intermediate Period, 1782-1570 BC

from The Egyptian Museum, Cairo

Terri Friedman at Guerrero Gallery in San Francisco

José Ramón Alejandro — Omó Iyá Omí (Children of Mother Water) [acrylic on canvas, 2018]

Pizzeria Jesus. Naples, November 2015.

Rhyl Monorail, Rhyl Sun Centre, August 1980

Source details and larger version.

Vintage flying machines.

Leon Ferrari

Tonto from Message from Space: Galactic Wars (Japan, 1978-79).

Me please, Piotr Szczur

Jacques Lacomblez — The Sky Ice  (oil on canvas, 2002)

Ad Reinhardt

Mud bath outlet, Lukács baths, Budapest, 1967. From the Budapest Municipal Photography Company archive.

Zdzisław Beksiński