Here’s Peter Steiner on WAMC’s Roundtable with Joe Donahue (broadcast August 28, 2018). Mr. Steiner began contributing to the New Yorker in 1979.
From his entry on the Spill‘s A-Z:
Mr. Steiner is responsible for one of the most famous (and most republished) New Yorker cartoons in modern times, “On the Internet, nobody knows you’re a dog.” (published July 5, 1993). An indication of its enduring popularity in our culture: a wikipedia page is devoted to it. He has also had novels published, as well as the limited edition “An Atheist in Heaven.” Website: www.plsteiner.com/
Below: An Atheist In Heaven