Wahler's first show at Palais de Tokyo was Five Billion Years (2006), which served as a prologue for his six year curatorial program.

Three Billion Years of Life, Stein and Day, New York, 1968.

The Next 13 Billion Years What Does the Big Bang Tell Us?

Across a Billion Years (1969)

In the Beginning: 6,000 Years ago or 15 Billion Years ago?

"Is Our Universe Likely to Decay within 20 Billion Years?"

Mars The Wonderworld: We're Just 3.5 Billion Years Too Late!

His first release as 'Eelke Kleijn' was '4.5 Billion Years' in 2003 on Segment Records.

Three Billion Years of Life, A. Cayeux, ed.

The novel Across a Billion Years by Robert Silverberg.