A COOL MAP TUNNELING TOOL: “Have you ever wondered which part of the other side of the earth is directly below you? Find out using this map tunnelling tool.”

UPDATE: Reader Scott McGlasson is thinking Tunguska: “I’ve always wondered if a miniature black hole is what hit Siberia in 1908, but have never put any effort into trying to figure out what the direct-opposite side of the planet would be, assuming the singularity passed all the way through. Odds are, given our planet’s geography, that it would be in an ocean somewhere, and it turns out to be off the southern coast of Chile. I wonder if anyone has ever surveyed the sea floor in that area?” Beats me. But unless I’m out of date on the physics — and I may well be — I think that Hawking quantum tunneling made miniature black holes seem much less likely, or at least much shorter-lived, which amounts to the same thing.

ANOTHER UPDATE: Steven Den Beste, along with several other readers, notes that there’s no particular reason to think the object that struck Tunguska was traveling perpendicular to the surface on impact anyway, meaning that it could have emerged anywhere.