A reader wrote to us recently about “what appears to be hammerhead worms stuck to the ceiling of [her nephew’s] carport.” The reader only asked us if we “have ever heard of this,” so she evidently is only curious about the very limited matter of whether or not we have ever heard of hammerhead worms on the ceiling of a carport. We’ll limit ourselves to this question, but since we have written about hammerhead worms several times before, we will also point to some additional articles about these creatures.