Tunguska event
William H. DeSmedt is an American author of science fiction. His debut novel, "Singularity" (2004), explores the 1908 Tunguska event and the speculative hypothesis that it was caused by a submicroscopic, primordial black hole. Although "Singularity" is a work of science fiction, in the tradition of Michael Crichton, its premise is anchored in real-world science.