"You're doing meta-wishes," he said, "and meta-wishes are trouble. Ever since people started reading Hofstadter, all of a sudden I've got to worry about punks like you erasing causality entirely."

In this episode of the Strange Horizons podcast, editor Anaea Lay presents Margaret Ronald's "The Witch's Knives."

Black holes are the Tyrannosaurus Rex of astronomy: mysterious and dangerous, the end result of millions of years of evolution, perfect predators which hold our fascinated attention all out of proportion to their actual rarity.

Her life too short to waste / on other people's fantasies, / she went to find her own,