All the Myriad Ways is a collection of 14 short science fiction stories and essays by American writer Larry Niven, originally published in 1971.

The oft-discussed essay "Man of Steel, Woman of Kleenex" is a humorous discussion of the difficulties Superman might encounter in trying to conceive a child with Lois Lane.

In "For a Foggy Night", another many-worlds story, a math professor crosses the street from his hotel through a dense fog to go to a bar.

In "Wait It Out", an astronaut marooned on Pluto exposes himself to the planet's extreme cold, intending to go into frozen sleep until rescue eventually comes, but finds his brain still functioning due to superconductivity.

In "Unfinished Story #1", a wizard describes a temperature-control spell that works by having a dull-witted demon select the kinetic energy of air molecules entering and leaving the room.