A white streak sliced heaven in half, moving west to east, and ending, with no loss of speed, in the caldera of the volcano a few thousand feet above us. In the moment before the sound reached us, Orolo remarked, “Clever. They don’t trust their aim enough to score a perfect hit on the probe. But they know enough geology to—” After that I could not hear anything for half an hour. Hearing was worse than useless; I was sorry I’d been born with ears.